Decidim has a cross-site scripting vulnerability in the version control page

published 2024-10-01 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-3017 , GHSA-cc4g-m3g7-xmw8

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits: 0; none known

Decidim is a participatory democracy framework. The version control feature used in resources is subject to potential XSS attack through a malformed URL. This vulnerability is fixed in 0.27.8.

Patch / fix

fixed in 2 links 1

rubygems decidim 0.27.8
decidim decidim 0.27.8

github.com/decidim/decidim@8a18c8b commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-10-01)

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
GitHub	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
rubygems	decidim	<0.27.8	0.27.8

Affected products

decidim decidim

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary