CVE-2026-23891

critical

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.

References

https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g

https://github.com/decidim/decidim/releases/tag/v0.31.1

https://github.com/decidim/decidim/releases/tag/v0.30.5

Details

Source: Mitre, NVD

Published: 2026-04-13

Updated: 2026-04-22

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 8.7

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Severity: High

CVSS v4

Base Score: 9.3

Vector: 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

Severity: Critical

EPSS

EPSS: 0.00061