CVE-2025-71241: SPIP < 4.3.6 Cross-Site Scripting in Private Area

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-19 · updated 2026-06-17
Weakness: CWE-79

Description

SPIP before 4.3.6, 4.2.17, and 4.1.20 allows Cross-Site Scripting (XSS) in the private area. The content of the error message displayed by the 'transmettre' API is not properly sanitized, allowing an attacker to inject malicious scripts. This vulnerability is mitigated by the SPIP security screen.

Affected products

SPIP: from 4.1.0 before 4.1.20; from 4.2.0 before 4.2.17; from 4.3.0 before 4.3.6 — fixed in 4.1.20, 4.2.17, 4.3.6

How to fix

Upgrade to a fixed version: SPIP 4.1.20, 4.2.17, 4.3.6. Check the vendor advisory for mitigations.

References

https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-3-6-SPIP-4-2-17-SPIP-4-1-20.html
https://git.spip.net/spip/spip
https://www.vulncheck.com/advisories/spip-cross-site-scripting-in-private-area

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