Open actionable advisories and recorded vendor fixes. This public package view has no inventory attached and cannot establish whether your deployment is affected. A vendor fix never resolves your finding; verify your installed version and the source guidance.
Open advisories
16 actionable advisories, newest first. Withdrawn advisories and news are excluded. Coverage is partial.
Impact Stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via elements crafted through the data-mce-object attribute, which are created and executed before sanitization. Impacts users of TinyMCE with the media plugin enabled. Patches This vulnerability has been patched in TinyMCE 8.9.3 and TinyMCE 7.9.4 by ensuring that, when using the media plugin, any content created through the data-mce-object attribute is properly sanitized first. Workarounds No official workaround available. Fix To avoid this vulnerability: Upgrade to TinyMCE 8.9.3 or higher. Upgrade to TinyMCE 7.9.4 or higher. Acknowledgements Tiny thanks Fariskhi Vidyan and David Vieira Kurz (HiSolutions AG) for their help identifying this vulnerability.
Recommended action: Upgrade to 8.9.3 or 7.9.4 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact Stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via crafted `data-mce-*` attributes, which are executed when content is rendered. Impacts users of TinyMCE with the media plugin enabled. Patches This vulnerability has been patched in TinyMCE 8.5.1, TinyMCE 7.9.3 and TinyMCE 5.11.1 LTS by ensuring that, when using the media plugin, any content with `data-mce-object` and `data-mce-p-*` attributes are properly sanitized. Workarounds No official workaround available. Fix To avoid this vulnerability: - Upgrade to TinyMCE 8.5.1 or higher. - Upgrade to TinyMCE 7.9.3 or higher. - Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract). Acknowledgements Tiny thanks Aymane MAZGUITI and Ange Primiterra for their help identifying this vulnerability.
Recommended action: Upgrade to 8.5.1 or 7.9.3 by release line; some affected versions have no fix yet, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact Stored XSS vulnerability via forged mce:protected comments. Allows attackers to bypass sanitization and inject scripts that execute when content is restored. Impacts users who utilize the protect option. Patches Patched by validating decoded mce:protected content against configured protect regex rules before restoring. Users should upgrade to the latest patched version. Workarounds No official workaround available. Fix To avoid this vulnerability: Upgrade to TinyMCE 8.5.1 or higher. Upgrade to TinyMCE 7.9.3 or higher. Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract). Acknowledgements Tiny thanks Ivan Babenko for their help identifying this vulnerability.
Recommended action: Upgrade to 8.5.1 or 7.9.3 by release line; some affected versions have no fix yet, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact Stored XSS vulnerability via unsanitized data-mce- attributes (data-mce-href, data-mce-src, data-mce-style). Allows attackers to inject malicious values that override safe attributes during serialization, bypassing validation. Patches Patched by stripping unsafe data-mce- attributes during parsing. Users should upgrade to the latest patched versions (5 LTS, 7.x, 8.x). Workarounds No official workaround available. Fix To avoid this vulnerability: Upgrade to TinyMCE 8.5.1 or higher. Upgrade to TinyMCE 7.9.3 or higher. Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract). Acknowledgements Tiny thanks Tadi Kadango (website) and Ivan Babenko for their help identifying this vulnerability.
Recommended action: Upgrade to 8.5.1 or 7.9.3 by release line; some affected versions have no fix yet, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact TinyMCE 6.8.x contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested <svg elements can bypass attribute sanitization and execute arbitrary JavaScript. Patches This issue affects TinyMCE 6.8.x-7.0.x. The vulnerability is fixed in TinyMCE 7.1.0 and later. Workarounds No official workaround available. Acknowledgements Tiny thanks maple3142 (<https://maple3142.net) of DEVCORE for their help identifying this vulnerability. References Fix introduced in TinyMCE 7.1.0 though a rewrite of code causing the vulnerability.
Recommended action: Upgrade to 7.1.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s content extraction code. When using the noneditableregexp option, specially crafted HTML attributes containing malicious code were able to be executed when content was extracted from the editor. Patches This vulnerability has been patched in TinyMCE 7.2.0, TinyMCE 6.8.4 and TinyMCE 5.11.0 LTS by ensuring that, when using the noneditableregexp option, any content within an attribute is properly verified to match the configured regular expression before being added. Fix To avoid this vulnerability: Upgrade to TinyMCE 7.2.0 or higher. Upgrade to TinyMCE 6.8.4 or higher for TinyMCE 6.x. Upgrade to TinyMCE 5.11.0 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract). References TinyMCE 6.8.4 TinyMCE 7.2.0 For more information If you have any questions or comments about this advisory: Email us at infosec@tiny.cloud Open an issue in the TinyMCE repo
Recommended action: Upgrade to 7.2.0, 6.8.4 or 5.11.0 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s content parsing code. This allowed specially crafted noscript elements containing malicious code to be executed when that content was loaded into the editor. Patches This vulnerability has been patched in TinyMCE 7.2.0, TinyMCE 6.8.4 and TinyMCE 5.11.0 LTS by ensuring that content within noscript elements are properly parsed. Fix To avoid this vulnerability: Upgrade to TinyMCE 7.2.0 or higher. Upgrade to TinyMCE 6.8.4 or higher for TinyMCE 6.x. Upgrade to TinyMCE 5.11.0 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract). Acknowledgements Tiny thanks Malav Khatri and another reporter for their help identifying this vulnerability. References TinyMCE 6.8.4 TinyMCE 7.2.0 For more information If you have any questions or comments about this advisory: Email us at infosec@tiny.cloud Open an issue in the TinyMCE repo
Recommended action: Upgrade to 7.2.0, 6.8.4 or 5.11.0 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s content insertion code. This allowed iframe elements containing malicious code to execute when inserted into the editor. These iframe elements are restricted in their permissions by same-origin browser protections, but could still trigger operations such as downloading of malicious assets. Fix TinyMCE 6.8.1 introduced a new sandboxiframes boolean option which adds the sandbox="" attribute to every iframe element by default when enabled. This will prevent cross-origin, and in special cases same-origin, XSS by embedded resources in iframe elements. From TinyMCE 7.0.0 onwards the default value of this option is true. In TinyMCE 7.0.0 a new sandboxiframesexclusions option was also added, allowing a list of domains to be specified that should be excluded from having the sandbox="" attribute applied when the sandboxiframes option is enabled. By default, this option is set to an array of domains that are provided…
Recommended action: Upgrade to 6.8.1 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s content loading and content inserting code. A SVG image could be loaded though an object or embed element and that image could potentially contain a XSS payload. Fix TinyMCE 6.8.1 introduced a new convertunsafeembeds option to automatically convert object and embed elements respective of their type attribute. From TinyMCE 7.0.0 onwards, the convertunsafeembeds option is enabled by default. Workarounds If you are using TinyMCE 6.8.1 or higher, set convertunsafeembeds to true. For any earlier versions, a custom NodeFilter is recommended to remove or modify any object or embed elements. This can be added using the editor.parser.addNodeFilter and editor.serializer.addNodeFilter APIs. Acknowledgements Tiny Technologies would like to thank Toni Huttunen of Fraktal Oy for discovering this vulnerability. References - TinyMCE 6.8.1 - TinyMCE 7.0.0
Recommended action: Upgrade to 7.0.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A mutation cross-site scripting (mXSS) vulnerability was discovered in TinyMCE’s core undo/redo functionality and other APIs and plugins. Text nodes within specific parents are not escaped upon serialization according to the HTML standard. If such text nodes contain a special character reserved as an internal marker, they can be combined with other HTML patterns to form malicious snippets. These snippets pass the initial sanitisation layer when the content is parsed into the editor body, but can trigger XSS when the special internal marker is removed from the content and re-parsed. Such mutations occur when serialised HTML content is processed before being stored in the undo stack, or when the following APIs and plugins are used: tinymce.Editor.getContent({ format: 'raw' }) tinymce.Editor.resetContent() Autosave Plugin Patches This vulnerability has been patched in TinyMCE 6.7.3 by: ensuring that any unescaped text nodes which contain the special internal marker are emptied…
Recommended action: Upgrade to 6.7.3 or 5.10.9 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s Notification Manager API. The vulnerability exploits TinyMCE's unfiltered notification system, which is used in error handling. The conditions for this exploit requires carefully crafted malicious content to have been inserted into the editor and a notification to have been triggered. When a notification was opened, the HTML within the text argument was displayed unfiltered in the notification. The vulnerability allowed arbitrary JavaScript execution when an notification presented in the TinyMCE UI for the current user. This issue could also be exploited by any integration which uses a TinyMCE notification to display unfiltered HTML content. Patches This vulnerability has been patched in TinyMCE 5.10.8 and TinyMCE 6.7.1 by ensuring that the HTML displayed in the notification is sanitized, preventing the exploit. Fix To avoid this vulnerability: Upgrade to TinyMCE 5.10.8 or higher for TinyMCE 5.x. Upgrade to…
Recommended action: Upgrade to 6.7.1 or 5.10.8 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A mutation cross-site scripting (mXSS) vulnerability was discovered in TinyMCE’s core undo and redo functionality. When a carefully-crafted HTML snippet passes the XSS sanitisation layer, it is manipulated as a string by internal trimming functions before being stored in the undo stack. If the HTML snippet is restored from the undo stack, the combination of the string manipulation and reparative parsing by either the browser's native DOMParser API (TinyMCE 6) or the SaxParser API (TinyMCE 5) mutates the HTML maliciously, allowing an XSS payload to be executed. This vulnerability also impacts these related TinyMCE APIs and plugins: tinymce.Editor.getContent({ format: 'raw' }) tinymce.Editor.resetContent() Autosave Plugin Patches This vulnerability has been patched in TinyMCE 5.10.8 and TinyMCE 6.7.1 by ensuring HTML is trimmed using node-level manipulation instead of string manipulation. Fix To avoid this vulnerability: Upgrade to TinyMCE 5.10.8 or higher for TinyMCE 5.x.…
Recommended action: Upgrade to 6.7.1 or 5.10.8 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A cross-site scripting (XSS) vulnerability was discovered in the alert and confirm dialogs when these dialogs were provided with malicious HTML content. This can occur in plugins that use the alert or confirm dialogs, such as in the image plugin, which presents these dialogs when certain errors occur. The vulnerability allowed arbitrary JavaScript execution when an alert presented in the TinyMCE UI for the current user. Patches This vulnerability has been patched in TinyMCE 5.10.7 and TinyMCE 6.3.1 by ensuring HTML sanitization was still performed after unwrapping invalid elements. Fix To avoid this vulnerability: - Upgrade to TinyMCE 5.10.7 or higher for TinyMCE 5.x. - Upgrade to TinyMCE 6.3.1 or higher for TinyMCE 6.x. Workaround To reduce the impact of this vulnerability: - Ensure the the imagesuploadhandler returns a valid value as per the imagesuploadhandler documentation. References - https://www.tiny.cloud/docs/release-notes/release-notes5107/#securityfixes -…
Recommended action: Upgrade to 6.3.1 or 5.10.7 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A cross-site scripting (XSS) vulnerability was discovered in the URL processing logic of the image and link plugins. The vulnerability allowed arbitrary JavaScript execution when updating an image or link using a specially crafted URL. This issue only impacted users while editing and the dangerous URLs were stripped in any content extracted from the editor. This impacts all users who are using TinyMCE 5.9.2 or lower. Patches This vulnerability has been patched in TinyMCE 5.10.0 by improved sanitization logic when updating URLs in the relevant plugins. Workarounds To work around this vulnerability, either: - Upgrade to TinyMCE 5.10.0 or higher - Disable the image and link plugins Acknowledgements Tiny Technologies would like to thank Yakir6 for discovering this vulnerability. References https://www.tiny.cloud/docs/release-notes/release-notes510/#securityfixes For more information If you have any questions or comments about this advisory: Email us at infosec@tiny.cloud Open an…
Recommended action: Upgrade to 5.10.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A cross-site scripting (XSS) vulnerability was discovered in the schema validation logic of the core parser. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor using the clipboard or editor APIs. This malicious content could then end up in content published outside the editor, if no server-side sanitization was performed. This impacts all users who are using TinyMCE 5.8.2 or lower. Patches This vulnerability has been patched in TinyMCE 5.9.0 by ensuring schema validation was still performed after unwrapping invalid elements. Workarounds To work around this vulnerability, either: - Upgrade to TinyMCE 5.9.0 or higher - Manually sanitize the content using the BeforeSetContent event (see below) Example: Manually sanitize content Acknowledgements Tiny Technologies would like to thank William Bowling for discovering this vulnerability. References…
Recommended action: Upgrade to 5.9.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact A cross-site scripting (XSS) vulnerability was discovered in the URL sanitization logic of the core parser. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor using the clipboard or APIs. This impacts all users who are using TinyMCE 5.5.1 or lower. Patches This vulnerability has been patched in TinyMCE 5.6.0 by improved URL sanitization logic. Workarounds To work around this vulnerability, either: - Upgrade to TinyMCE 5.6.0 or higher - Manually sanitize iframe, object and embed URL attributes using a TinyMCE node filter. - Disable iframe, object, and embed elements in your content using the invalidelements setting. Example: Sanitizing using a node filter Example: Using invalidelements Acknowledgements Tiny Technologies would like to thank Aaron Bishop at SecurityMetrics for discovering this vulnerability. References https://www.tiny.cloud/docs/release-notes/release-notes56/#securityfixes For more…
Recommended action: Upgrade to 5.6.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.