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CVE-2026-27474

MediumPublished

SPIP < 4.4.9 Cross-Site Scripting in Private Area (Incomplete Fix)

Published: Feb 19, 2026
Updated: Mar 5, 2026
Assigning CNA: VulnCheck
Evidence observed: Sep 1, 2026

Primary CVSS

4.8/ 10Medium

nvd · CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 17.0%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

SPIP before 4.4.9 allows Cross-Site Scripting (XSS) in the private area, complementing an incomplete fix from SPIP 4.4.8. The echappe_anti_xss() function was not systematically applied to input, form, button, and anchor (a) HTML tags, allowing an attacker to inject malicious scripts through these elements. This vulnerability is not mitigated by the SPIP security screen.

Sources

CVE-2026-27472-and-CVE-2026-27474PoC
Proof-of-concept for CVE-2026-27472 (blind SSRF) and CVE-2026-27474 (stored XSS) in SPIP 4.4.8 syndication feature, demonstrating exploitation steps for administrators.

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