GHSA-q79h-67vx-m9xg is a medium-severity (CVSS 6) CWE-862 vulnerability in decidim-verifications. O3 Security confirms whether GHSA-q79h-67vx-m9xg is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Decidim: CSV census record endpoints improper authorization
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for GHSA-q79h-67vx-m9xg.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-q79h-67vx-m9xg plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 370,894 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
decidim-verifications💎decidim-verifications💎decidim-verificationsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
Description
A participant manager can access and modify the CSV census record admin forms.
Technical description
The CSV census admin record-management surface under /admin/csv_census/census_logs does not enforce admin-only authorization before rendering or mutating Decidim::Verifications::CsvDatum.
A participant manager (which can only manage participants) can therefore open the admin forms, create or update census rows, and delete rows directly.
Reproduction steps:
- Sign in a participant admin and open
http://localhost:3000/admin/csv_census/census_logs/new_recordin the browser. Confirm the create form loads even though the session is not a full admin.
Note that normal participant accounts were not able to access the CSV census records which is good.
Impact
Any participant admin can create, alter, or remove CSV census rows, which can corrupt verification data relied on by authorization workflows.
Patches
See https://github.com/decidim/decidim/pull/16674 and https://github.com/decidim/decidim/pull/16703
Workarounds
Disable Organization Census verification method
Reference
OWASP A01:2021 Broken Access Control
Credits
This issue was discovered in a security audit organized by the Decidim Association and made by Radically Open Security against Decidim financed by NGI.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | decidim-verifications | all versions | 0.30.9 |
| 💎RubyGems | decidim-verifications | ≥ 0.31.0.rc1&&< 0.31.5 | 0.31.5 |
| 💎RubyGems | decidim-verifications | ≥ 0.32.0.rc1&&< 0.32.0 | 0.32.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for decidim-verifications. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update decidim-verifications to 0.30.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q79h-67vx-m9xg is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-q79h-67vx-m9xg is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-q79h-67vx-m9xg. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-q79h-67vx-m9xg in your dependencies?
O3 detects GHSA-q79h-67vx-m9xg across RubyGems dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.