9.3

CVE-2026-23891

Decidim has a Cross-site scripting (XSS) vulnerability via user name field

Decidim is a participatory democracy framework. In versions below 0.30.5 and 0.31.0.rc1 through 0.31.0, a stored code execution vulnerability in the user name field allows a low-privileged attacker to execute arbitrary code in the context of any user who passively visits a comment page, resulting in high confidentiality and integrity impact across security boundaries. This issue has been fixed in versions 0.30.5 and 0.31.1.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Decidim ≫ Decidim SwPlatformruby Version < 0.30.5
Decidim ≫ Decidim SwPlatformruby Version >= 0.31.0 < 0.31.1
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.36% 0.273
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 8.7 2.3 5.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
security-advisories@github.com 9.3 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/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
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

https://github.com/decidim/decidim/releases/tag/v0.30.5
Product
Release Notes
https://github.com/decidim/decidim/releases/tag/v0.31.1
Product
Release Notes
https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g
Vendor Advisory