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Packagist package

contao/comments-bundle

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

2 actionable advisories, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. Critical, CVSS 9.3PackagistAmendedPublished

    Contao: Cross-site scripting in the comments bundle

    CVE-2026-107845 · GHSA-628f-v4f6-p37r

    Affected
    • Packagist contao/comments-bundle >= 4.0.0, < 5.3.50; >= 5.4.0-RC1, < 5.7.12
    Fixed in
    5.7.125.3.50· Vendor fix available
    Issue
    An unauthenticated front end visitor can post a comment containing a XSS injection. The victim is any back end user who opens the Comments module, and moderation makes exposure certain rather than preventing it. No Content-Security-Policy header is sent on the Contao back end, so nothing mitigates the inline handler. Impact Anyone on the internet can inject script that executes in the Contao back end origin, under the session of whichever user opens the Comments module, with no click and no hover. From there the payload acts as that user through the back end: reading any module they can reach, creating a new administrator, or editing a template, which on Contao is a documented path from back end write access to code execution. Moderation does not help and in fact guarantees exposure, since unpublished comments are still inserted and a moderator has to open the list to act on them.

    Recommended action: Upgrade to 5.7.12 or 5.3.50 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:osv.dev (1)github.com (2)Source checked Evidence →
  2. Medium, CVSS 4.3PackagistPublished

    Contao: Insufficient BBCode sanitizer

    CVE-2024-28234 · GHSA-j55w-hjpj-825g

    Affected
    • Packagist contao/comments-bundle >= 2.0.0, < 4.13.40; >= 5.0.0-RC1, < 5.3.4
    Fixed in
    4.13.405.3.4· Vendor fix available
    Issue
    Impact If BBCode is enabled for comments, users can inject CSS styles. Patches Update to Contao 4.13.40 or 5.3.4. Workarounds Disable BBCode for comments. References https://contao.org/en/security-advisories/insufficient-bbcode-sanitization For more information If you have any questions or comments about this advisory, open an issue in contao/contao.

    Recommended action: Upgrade to 5.3.4 or 4.13.40 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:github.comSource checked Evidence →