TabberNeue vulnerable to Stored XSS through wikitext

Exploitation

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

CVSS

8.6 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

EPSS

• CVE-2025-53093: 0.42% estimated exploitation activity in the next 30 days; percentile 36.38 (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 Arbitrary HTML can be inserted into the DOM by inserting a payload into any allowed attribute of the <tabber tag. Details The args provided within the wikitext as attributes to the <tabber tag are passed to the TabberComponentTabs class: https://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/blob/3a23b703ce36cfc4128e7921841f68230be4059a/includes/Tabber.php#L76 In TabberComponentTabs, the attributes are validated before being supplied to the Tabs template. https://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue/blob/3a23b703ce36cfc4128e7921841f68230be4059a/includes/Components/TabberComponentTabs.php#L15-L31 However, the validation is insufficient. What Sanitizer::validateTagAttributes does is call validateAttributes, which However, the attribute values are expected to be escaped when inserted into HTML. The attribute values are then inserted into HTML without being escaped:…

Published by the source

27 Jun 2025, 20:50 UTC

Last modified by the source

27 Jun 2025, 20:51 UTC

Source last checked

26 Oct 2026, 14:34 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-jfj7-249r-7j2m

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# Patch Next advisory brief: CVE-2025-53093

Advisory: TabberNeue vulnerable to Stored XSS through wikitext
IDs: CVE-2025-53093, GHSA-jfj7-249r-7j2m
Record: https://patchnext.com/advisories/cve-2025-53093 (revision 1, source checked 26 Oct 2026, 14:34 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: starcitizentools/tabber-neue 3.1.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist starcitizentools/tabber-neue: affected >= 3.0.0, < 3.1.1; fixed in 3.1.1

## Suggested inspection (read-only)
- Packagist starcitizentools/tabber-neue: 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 starcitizentools/tabber-neue.
- 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-jfj7-249r-7j2m (GitHub-reviewed advisory GHSA-jfj7-249r-7j2m lists affected ranges: Packagist starcitizentools/tabber-neue >=3.0.0 <3.1.1)

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