How severe is CVE-2025-59017?

No CVSS score has been assigned to CVE-2025-59017 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2025-59017?

CVE-2025-59017 affects the following packages: typo3/cms-workspaces (Packagist), typo3/cms-workspaces (Packagist), typo3/cms-workspaces (Packagist), typo3/cms-workspaces (Packagist), typo3/cms-workspaces (Packagist), typo3/cms-recycler (Packagist), typo3/cms-recycler (Packagist), typo3/cms-recycler (Packagist), and 16 more. Ecosystems affected: Packagist.

How do I fix CVE-2025-59017?

Update typo3/cms-workspaces to 12.4.37 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-59017 is resolved across your whole dependency graph.

How do I detect CVE-2025-59017 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for typo3/cms-workspaces, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2025-59017 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is CVE-2025-59017 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-59017 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-59017?

CVE-2025-59017 has an EPSS (Exploit Prediction Scoring System) score of 0.3%, placing it in the 23th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2025-59017?

CVE-2025-59017 is classified as CWE-862 (CWE-862). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2025-59017 published, and has it been updated?

CVE-2025-59017 was published on September 9, 2025 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

CVE-2025-59017 — cms-workspaces

Fix: TYPO3-CMS/backend@0aedf33

CVE-2025-59017 is a CWE-862 vulnerability in typo3/cms-workspaces. A fix is available for typo3/cms-workspaces — see the affected versions and patch details below.

Broken Access Control in Backend AJAX Routes

Also known asGHSA-2fhw-2j7m-mr4m

Published

Sep 9, 2025

Updated

Oct 28, 2026

Affected

24 pkgs

Patched

24 / 24

Exploits

None indexed

Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-59017.

EPSS Exploitation Probability

via FIRST.org ↗

0.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs23th percentile — riskier than 23% of all scored CVEsHighest risk

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

Real-World Exposure

24 pkgs affected

🐘typo3/cms-workspaces🐘typo3/cms-workspaces🐘typo3/cms-workspaces🐘typo3/cms-workspaces🐘typo3/cms-workspaces🐘typo3/cms-recycler🐘typo3/cms-recycler🐘typo3/cms-recycler+16 more

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

Missing authorization checks in the Backend Routing of 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 directly invoke AJAX backend routes without having access to the corresponding backend modules.

Affected Packages

24 total 24 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`typo3/cms-workspaces`	≥ 9.0.0&&< 12.4.37	12.4.37`composer require typo3/cms-workspaces:^12.4.37`
🐘Packagist	`typo3/cms-workspaces`	≥ 10.0.0&&< 12.4.37	12.4.37`composer require typo3/cms-workspaces:^12.4.37`
🐘Packagist	`typo3/cms-workspaces`	≥ 11.0.0&&< 12.4.37	12.4.37`composer require typo3/cms-workspaces:^12.4.37`
🐘Packagist	`typo3/cms-workspaces`	≥ 12.0.0&&< 12.4.37	12.4.37`composer require typo3/cms-workspaces:^12.4.37`
🐘Packagist	`typo3/cms-workspaces`	≥ 13.0.0&&< 13.4.18	13.4.18`composer require typo3/cms-workspaces:^13.4.18`
🐘Packagist	`typo3/cms-recycler`	≥ 9.0.0&&< 12.4.37	12.4.37`composer require typo3/cms-recycler:^12.4.37`

Affected Products

1 product · 5 configurations

Application

typo3typo3

≥ 13.0.0 && < 13.4.18

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for typo3/cms-workspaces, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update typo3/cms-workspaces to 12.4.37 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-59017 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2025-59017 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works