How severe is CVE-2025-59017?

CVE-2025-59017 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-59017 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59017?

CVE-2025-59017 affects Typo3. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59017?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-59017 have an EU (EUVD) identifier?

Yes. CVE-2025-59017 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27228.

When was CVE-2025-59017 published?

CVE-2025-59017 was published on 2025-09-09 and last updated on 2026-06-17.

CVE-2025-59017

CVE-2025-59017 is a high-severity vulnerability in Typo3 with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 5.3
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27228
Weakness: CWE-862
Affected product: Typo3
Published: 2025-09-09
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-59017?: CVE-2025-59017 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-59017 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59017?: CVE-2025-59017 affects Typo3. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59017?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-59017 have an EU (EUVD) identifier?: Yes. CVE-2025-59017 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27228.
When was CVE-2025-59017 published?: CVE-2025-59017 was published on 2025-09-09 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*

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