CVE-2025-12849: Auth Bypass (CVSS 5.3)

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.

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CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-862 Missing Authorization

References

Other References

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/28.0.2/v10/include-functions-v10.php#L42 https://plugins.trac.wordpress.org/browser/contest-gallery/tags/28.0.2/v10/include-functions-v10.php#L47 https://plugins.trac.wordpress.org/browser/contest-gallery/tags/28.0.2/v10/include-functions-v10.php#L64 https://plugins.trac.wordpress.org/browser/contest-gallery/tags/28.0.2/v10/v10-admin/gallery/wp-uploader.php#L15 https://plugins.trac.wordpress.org/browser/contest-gallery/tags/28.0.2/v10/v10-admin/gallery/wp-uploader.php#L173 https://wordpress.org/plugins/contest-gallery/#developers https://www.wordfence.com/threat-intel/vulnerabilities/id/e000c4ad-43ec-4ad0-89f9-74e9e6d8b917?source=cve

Frequently Asked Questions

What is CVE-2025-12849? +

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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-12849? +

CVE-2025-12849 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-12849? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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