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CVE

CVE-2026-23891

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

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
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
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/decidim/decidim/releases/tag/v0.30.5, https://github.com/decidim/decidim/releases/tag/v0.31.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23891.json, https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g, https://nvd.nist.gov/vuln/detail/CVE-2026-23891

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00356%
EPSS Percentile
0.28385%
Introduced Version
0795da14454a4fb342d70654bdc267d1d6d5bca5
Fix Available
0a9443ed804ee6274fab904878bc0103af1c0f69

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