CVE-2026-31859

MEDIUM

6.1

Description

Craft is a content management system (CMS). The fix for CVE-2025-35939 in craftcms/cms introduced a strip_tags() call in src/web/User.php to sanitize return URLs before they are stored in the session. However, strip_tags() only removes HTML tags (angle brackets) -- it does not inspect or filter URL schemes. Payloads like javascript:alert(document.cookie) contain no HTML tags and pass through strip_tags() completely unmodified, enabling reflected XSS when the return URL is rendered in an href attribute. This vulnerability is fixed in 5.9.7 and 4.17.3.

Details CVE

Score CVSS v3.16.1

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurREQUIRED

Publie3/11/2026

Derniere modification3/17/2026

Sourcenvd

Observations honeypot0

Produits affectes

craftcms:craft_cms

Faiblesses (CWE)

CWE-79CWE-116

References

https://github.com/craftcms/cms/security/advisories/GHSA-fvwq-45qv-xvhv(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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