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MEDIUM5.4

GHSA-529p-jj47-w3m3

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

Quick fix

GHSA-529p-jj47-w3m3 — decidim-admin: upgrade to the fixed version with the command below.

bundle update decidim-admin

Details

### 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

Are you affected?

Enter the version of the package you're using.

Affected packages

RubyGems/decidim-admin
Introduced in: 0Fixed in: 0.27.6
Fixbundle update decidim-admin
RubyGems/decidim-admin
Introduced in: 0.28.0.rc1Fixed in: 0.28.1
Fixbundle update decidim-admin

References