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MEDIUM severity

CVE-2013-1843 — cms-core

MEDIUM

CVE-2013-1843 is a medium-severity (CVSS 5.3) CWE-399 vulnerability in typo3/cms-core. A fix is available for typo3/cms-core — see the affected versions and patch details below.

TYPO3 Open redirect vulnerability in the Access tracking mechanism

Published
Updated
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs84th percentile — riskier than 84% of all scored CVEsHighest risk
0.10%1.05%2.00%2.95%0.6%2.4%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected
🐘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

Open redirect vulnerability in the Access tracking mechanism in TYPO3 4.5.x before 4.5.24, 4.6.x before 4.6.17, 4.7.x before 4.7.9, and 6.0.x before 6.0.3 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via unspecified vectors.

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagisttypo3/cms-core≥ 4.5.0&&< 4.5.244.5.24composer require typo3/cms-core:^4.5.24
🐘Packagisttypo3/cms-core≥ 4.6.0&&< 4.6.174.6.17composer require typo3/cms-core:^4.6.17
🐘Packagisttypo3/cms-core≥ 4.7.0&&< 4.7.94.7.9composer require typo3/cms-core:^4.7.9
🐘Packagisttypo3/cms-core≥ 6.0.0&&< 6.0.36.0.3composer require typo3/cms-core:^6.0.3

Affected Products

1 product · 54 configurations
Application
typo3typo3
54 versions
4.54.5.04.5.14.5.24.5.34.5.44.5.54.5.64.5.74.5.84.5.94.5.10

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, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update typo3/cms-core to 4.5.24 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-1843 is resolved across your whole dependency graph.

  3. Workarounds

    Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.

Frequently Asked Questions

Open redirect vulnerability in the Access tracking mechanism in TYPO3 4.5.x before 4.5.24, 4.6.x before 4.6.17, 4.7.x before 4.7.9, and 6.0.x before 6.0.3 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via unspecified vectors.
O3 Security · Impact-Aware SCA

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CVE-2013-1843: cms-core Open Redirect — Fixed in 4.5.24