TI-2025-40203 Aliases CVE-2025-65017 GHSA-3cx6-j9j4-54mp

Decidim's private data exports can lead to data leaks

HIGH 71CWE-200Published 2026-02-03 · Updated 2026-02-03

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

Decidim is a participatory democracy framework. In versions from 0.30.0 to before 0.30.4 and from 0.31.0.rc1 to before 0.31.0, the private data exports can lead to data leaks in case the UUID generation, causing collisions for the generated UUIDs. This issue has been patched in versions 0.30.4 and 0.31.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00313 24th percentileScored 2026-11-07

Fix Fixed decidim (decidim): 0.30.4, 0.31.0decidim-core (RubyGems): 0.30.4+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
decidim	decidim	0.30.0 to before 0.30.4; 0.31.0.r1 to before 0.31.0	0.30.4, 0.31.0	Patch available	CNA
—	decidim-core (RubyGems)	0.30.0 to before 0.30.4	0.30.4	Patch available	GHSA-3cx6-j9j4-54mp
—	decidim (RubyGems)	0.30.0 to before 0.30.4	0.30.4	Patch available	GHSA-3cx6-j9j4-54mp

decidim Vendordecidim Affected 0.30.0 to before 0.30.4; 0.31.0.r1 to before 0.31.0 Fixed in 0.30.4, 0.31.0 Patch available CNA
decidim-core (RubyGems) Vendor— Affected 0.30.0 to before 0.30.4 Fixed in 0.30.4 Patch available GHSA-3cx6-j9j4-54mp
decidim (RubyGems) Vendor— Affected 0.30.0 to before 0.30.4 Fixed in 0.30.4 Patch available GHSA-3cx6-j9j4-54mp

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:decidim:decidim::::::ruby::*	0.30.0 to before 0.30.4	Vulnerable	decidim
cpe:2.3:a:decidim:decidim:0.31.0:rc1::::ruby::*	0.31.0 rc1	Vulnerable	decidim
cpe:2.3:a:decidim:decidim:0.31.0:rc2::::ruby::*	0.31.0 rc2	Vulnerable	decidim

cpe:2.3:a:decidim:decidim:*:*:*:*:*:ruby:*:* Versions 0.30.0 to before 0.30.4 Vulnerable ·decidim
cpe:2.3:a:decidim:decidim:0.31.0:rc1:*:*:*:ruby:*:* Versions 0.31.0 rc1 Vulnerable ·decidim
cpe:2.3:a:decidim:decidim:0.31.0:rc2:*:*:*:ruby:*:* Versions 0.31.0 rc2 Vulnerable ·decidim

Remediation

Fix · CNA decidim (decidim) Fixed in 0.30.4, 0.31.0
Fix · GHSA-3cx6-j9j4-54mp decidim-core (RubyGems) Fixed in 0.30.4 Advisory →
Fix · GHSA-3cx6-j9j4-54mp decidim (RubyGems) Fixed in 0.30.4 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-65017
2026-10-03 Alias added: GHSA-3cx6-j9j4-54mp

References

Patch 1

https://github.com/decidim/decidim/pull/13571

Advisory 2

Other 5

TI-2023-16936 Decidim vulnerable to sensitive data disclosure CVSS 3.1HIGH 7.5
TI-2026-19249 Decidim has a Cross-site scripting (XSS) vulnerability via user name field CVSS 4.0CRITICAL 9.3
TI-2023-18306 Decidim has broken access control in templates CVSS 3.1CRITICAL 9.1
TI-2023-16935 Decidim Cross-site Scripting vulnerability in the processes filter CVSS 3.1HIGH 8.1
TI-2023-15969 Decidim Cross-site Scripting vulnerability in the external link redirections CVSS 3.1HIGH 8.1
TI-2026-29525 Decidim amendments can be accepted or rejected by anyone CVSS 3.1HIGH 7.5

See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences