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Fencer Vulns
medium 6.0

CVE-2026-45415 json

Decidim: CSV census record endpoints improper authorization

published 2026-07-13 3 mo ago modified 2026-09-08 2 mo ago also EUVD-2026-54236 , GHSA-q79h-67vx-m9xg

cvss
6.0
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 37%
public exploits
0
none known

Summary

Decidim is a participatory democracy framework. Prior to 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, the /admin/csv_census/census_logs record-management endpoints do not enforce full administrator authorization before rendering or mutating Decidim::Verifications::CsvDatum, allowing a participant manager to create, alter, or remove census records. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.

Patch / fix

  • rubygems decidim-verifications 0.30.9, 0.31.5, 0.32.0
  • decidim decidim 0.30.9, 0.31.5, 0.32.0

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/decidim/decidim/security/advisories/GHSA-q79h-67vx-m9xg referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.0 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L
GitHub 3.1 6.0 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L

Affected packages

ecosystem package affected fixed in
rubygems decidim-verifications
<0.30.9
>=0.31.0.rc1, <0.31.5
>=0.32.0.rc1, <0.32.0
0.30.9
0.31.5
0.32.0

Affected products

  • decidim decidim

Classification

Weakness

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.