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MEDIUM severity

CVE-2024-27095 — decidim-admin

MEDIUM

CVE-2024-27095 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in decidim-admin. A fix is available for decidim-admin — see the affected versions and patch details below.

Decidim cross-site scripting (XSS) in the admin panel

Also known asGHSA-529p-jj47-w3m3
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2024-27095.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs28th percentile — riskier than 28% of all scored CVEsHighest risk
0.00%0.28%0.56%0.84%0.3%0.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
💎decidim-admin💎decidim-admin

Real-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

Impact

The admin panel is subject to potential XSS attach in case the attacker manages to modify some records being uploaded to the server.

The attacker is able to change e.g. to <svg onload=alert('XSS')> if they know how to craft these requests themselves. And then enter the returned blob ID to the form inputs manually by modifying the edit page source.

Patches

Available in versions 0.27.6 and 0.28.1.

Workarounds

Review the user accounts that have access to the admin panel (i.e. general Administrators, and participatory space's Administrators) and remove access to them if they don't need it.

References

OWASP ASVS v4.0.3-5.1.3

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
💎RubyGemsdecidim-adminall versions0.27.6bundle update decidim-admin --conservative
💎RubyGemsdecidim-admin≥ 0.28.0.rc1&&< 0.28.10.28.1bundle update decidim-admin --conservative

Affected Products

1 product · 7 configurations
Application
decidimdecidim
< 0.27.6
1 version
0.28.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for decidim-admin, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update decidim-admin to 0.27.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-27095 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### Impact The admin panel is subject to potential XSS attach in case the attacker manages to modify some records being uploaded to the server. The attacker is able to change e.g. to `<svg onload=alert('XSS')>` if they know how to craft these requests themselves. And then enter the returned blob ID to the form inputs manually by modifying the edit page source. ### Patches Available in versions 0.27.6 and 0.28.1. ### Workarounds Review the user accounts that have access to the admin panel (i.e. general Administrators, and participatory space's Administrators) and remove access to them if
O3 Security · Impact-Aware SCA

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CVE-2024-27095: decidim-admin XSS — Fixed in 0.27.6