Contest Gallery <= 28.0.2 - Missing Authorization

Missing Authorization
CVE CVE-2025-12849
CVSS Medium (5.3)
Publicly Published November 14, 2025
Last Updated November 15, 2025
Researcher type5afe
Description

The Contest Gallery plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 28.0.2. This is due to the plugin registering the `cg_check_wp_admin_upload_v10` AJAX action for both authenticated and unauthenticated users without implementing capability checks or nonce verification. This makes it possible for unauthenticated attackers to inject arbitrary WordPress media attachments into galleries and manipulate gallery metadata via the `cg_check_wp_admin_upload_v10` action. It does not enable an attacker to move or upload files.

References

1 affected software package

Software Type Plugin
Software Slug contest-gallery (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 28.0.2
Patched Version
  • 28.0.3
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