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CVE-2026-23891

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

Published: Apr 13, 2026Updated: Apr 22, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
8.7CVSSHIGH
EPSS Score
0.4%
Top 72.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

decidimdecidim
On-prem
Enterprise Software / collaboration-groupware
decidimoss-projectEnterprise Softwareaka decidim framework

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g
github.com
https://github.com/decidim/decidim/releases/tag/v0.30.5
github.com
https://github.com/decidim/decidim/releases/tag/v0.31.1
github.com

Timeline

Published
Apr 13, 2026
Last Updated
Apr 22, 2026

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