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CVE-2025-59016

CVE-2025-59016 is a CWE-209 vulnerability in typo3/cms-core. O3 Security confirms whether CVE-2025-59016 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Information Disclosure via File Abstraction Layer

Also known asGHSA-cvm2-5f78-g9m8
Published
Sep 9, 2025
Updated
Jul 15, 2026
Affected
5 pkgs
Patched
5 / 5
Exploits
None indexed

Blast Radius

5 pkgs affected
🐘typo3/cms-core🐘typo3/cms-core🐘typo3/cms-core🐘typo3/cms-core🐘typo3/cms-core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Error messages containing sensitive information in the File Abstraction Layer in TYPO3 CMS versions 9.0.0-9.5.54, 10.0.0-10.4.53, 11.0.0-11.5.47, 12.0.0-12.4.36, and 13.0.0-13.4.17 allow backend users to disclose full file paths via failed low-level file-system operations.

Affected Packages

5 total 5 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagisttypo3/cms-core9.0.0&&< 12.4.3712.4.37
🐘Packagisttypo3/cms-core10.0.0&&< 12.4.3712.4.37
🐘Packagisttypo3/cms-core11.0.0&&< 12.4.3712.4.37
🐘Packagisttypo3/cms-core12.0.0&&< 12.4.3712.4.37
🐘Packagisttypo3/cms-core13.0.0&&< 13.4.1813.4.18

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for typo3/cms-core. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update typo3/cms-core to 12.4.37 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-59016 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether CVE-2025-59016 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2025-59016. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Error messages containing sensitive information in the File Abstraction Layer in TYPO3 CMS versions 9.0.0-9.5.54, 10.0.0-10.4.53, 11.0.0-11.5.47, 12.0.0-12.4.36, and 13.0.0-13.4.17 allow backend users to disclose full file paths via failed low-level file-system operations.
O3 Security · Impact-Aware SCA

Is CVE-2025-59016 in your dependencies?

O3 detects CVE-2025-59016 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.