How severe is CVE-2025-12849?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Contest-Gallery Contest Gallery – Upload & Vote Photos, Media, Sell With Paypal Stripe

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.

Vulnerability class: Broken Access Control

EPSS: 0.003 (24.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Contest-gallery Contest Gallery – Upload & Vote Photos, Media, Sell With Paypal Stripe — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

Frequently asked questions

What is CVE-2025-12849?: CVE-2025-12849 is a medium-severity vulnerability in Contest-Gallery Contest Gallery – Upload & Vote Photos, Media, Sell With Paypal Stripe, classified under Missing Authorization. CVSS score: 5.3/10. Published 2025-11-15.
How severe is CVE-2025-12849?: Medium severity. CVSS v3 base score is 5.3 out of 10.