Pimcore's Admin Classic Bundle allows HTML Injection

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

1.8 · CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2025-30166: 0.26% estimated exploitation activity in the next 30 days; percentile 17.53 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary An HTML injection issue allows users with access to the email sending functionality to inject arbitrary HTML code into emails sent via the admin interface, potentially leading to session cookie theft and the alteration of page content. Details The vulnerability was discovered in the /admin/email/send-test-email endpoint using the POST method. The vulnerable parameter is content, which permits the injection of arbitrary HTML code during the email sending process. While JavaScript code injection is blocked through filtering, HTML code injection remains possible. PoC To reproduce the vulnerability, a user must fill out the email's content form with the desired HTML payload. Impact This HTML injection vulnerability can potentially enable phishing attacks by allowing the insertion of any html like fake login forms, etc. All functionalities that process user input should be carefully reviewed to ensure that data is appropriately encoded as HTML entities in server responses. For…

Published by the source

8 Apr 2025, 14:51 UTC

Last modified by the source

8 Apr 2025, 14:51 UTC

Source last checked

26 Oct 2026, 14:30 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-x82r-6j37-vrgg

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# Patch Next advisory brief: CVE-2025-30166

Advisory: Pimcore's Admin Classic Bundle allows HTML Injection
IDs: CVE-2025-30166, GHSA-x82r-6j37-vrgg
Record: https://patchnext.com/advisories/cve-2025-30166 (revision 1, source checked 26 Oct 2026, 14:30 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 1.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: pimcore/admin-ui-classic-bundle 1.7.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist pimcore/admin-ui-classic-bundle: affected < 1.7.6; fixed in 1.7.6

## Suggested inspection (read-only)
- Packagist pimcore/admin-ui-classic-bundle: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on pimcore/admin-ui-classic-bundle.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-x82r-6j37-vrgg (GitHub-reviewed advisory GHSA-x82r-6j37-vrgg lists affected ranges: Packagist pimcore/admin-ui-classic-bundle >=0 <1.7.6)

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