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Medium, CVSS 6.5

Typo3 Information Disclosure

CVE-2011-4900GHSA-rwx5-7x5r-jgrm

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (typo3/cms 4.5.4), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Packagist typo3/cms

    Affected
    < 4.5.4
    Fixed in
    4.5.4

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
6.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
  • CVE-2011-4900: 0.95% estimated exploitation activity in the next 30 days; percentile 61.38 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

TYPO3 before 4.5.4 allows Information Disclosure in the backend.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-rwx5-7x5r-jgrm

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2011-4900

Advisory: Typo3 Information Disclosure
IDs: CVE-2011-4900, GHSA-rwx5-7x5r-jgrm
Record: https://patchnext.com/advisories/cve-2011-4900 (revision 1, source checked 26 Oct 2026, 14:14 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: typo3/cms 4.5.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist typo3/cms: affected < 4.5.4; fixed in 4.5.4

## Suggested inspection (read-only)
- Packagist typo3/cms: 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 typo3/cms.
- 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-rwx5-7x5r-jgrm (GitHub-reviewed advisory GHSA-rwx5-7x5r-jgrm lists affected ranges: Packagist typo3/cms >=0 <4.5.4)

Commands are suggestions: review each one before running it.

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