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CVE-2023-34090

HIGH

Decidim vulnerable to sensitive data disclosure

Published July 11, 2023Updated July 8, 2026Source: osv

Summary

Note: added the actual report as a [comment](https://github.com/decidim/decidim/security/advisories/GHSA-jm79-9pm4-vrw9#advisory-comment-81110). ### Summary Decidim, a platform for digital citizen participation, uses a third-party library named Ransack for filtering certain database collections (e.g., public meetings). By default, this library allows filtering on all data attributes and associations. This allows an unauthenticated remote attacker to exfiltrate non-public data from the underlying database of a Decidim instance (e.g., exfiltrating data from the user table). ### Impact This issue may lead to Sensitive Data Disclosure. ### Patches The problem was patched in [v0.27.3](https://github.com/decidim/decidim/releases/tag/v0.27.3). ### Workarounds Disable or unpublish all meetings components from your application.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update decidim-meetings to 0.27.3 or later
gem install decidim-meetings -v 0.27.3
Bundler
Update decidim to 0.27.3 or later
gem install decidim -v 0.27.3

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

PackageEcosystemAffectedFixed In
decidim-meetings
rubygems
0.27.0, 0.27.1, 0.27.20.27.3
decidim
rubygems
0.27.0, 0.27.1, 0.27.20.27.3

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-200
    Information ExposureMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Frequently Asked Questions

What is CVE-2023-34090?
Decidim vulnerable to sensitive data disclosure This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2023-34090?
CVE-2023-34090 affects decidim-meetings and decidim. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2023-34090 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-jm79-9pm4-vrw9

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