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Critical · 9.3 CVE-2026-23891 EUVD-2026-22024GHSA-fc46-r95f-hq7g

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

Published Apr 13, 2026 · Updated Apr 14, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
decidim decidim >= 0.31.0.rc1, < 0.31.1, < 0.30.5 —

Affected packages

EcosystemPackageAffectedFixedRecord
RubyGems decidim-core >= 0.31.0.rc1, < 0.31.1 0.31.1 GHSA-fc46-r95f-hq7g
RubyGems decidim-core < 0.30.5 0.30.5 GHSA-fc46-r95f-hq7g

References