CVE-2025-59017: typo3 Auth Bypass — Fix

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.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-862 Missing Authorization

Affected Products

Vendor	Product	Versions
typo3	typo3	9.0.0 — 9.5.55
typo3	typo3	10.0.0 — 10.4.54
typo3	typo3	11.0.0 — 11.5.48
typo3	typo3	12.0.0 — 12.4.37
typo3	typo3	13.0.0 — 13.4.18

References

Advisories & Patches

https://typo3.org/security/advisory/typo3-core-sa-2025-021

Frequently Asked Questions

What is CVE-2025-59017? +

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. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-59017? +

CVE-2025-59017 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-59017? +

CVE-2025-59017 affects products from typo3, specifically: typo3. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59017? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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