CVE-2025-12849Network attack vector

Unauthenticated gallery manipulation via unprotected AJAX action

Published Nov 15, 2025 · Updated Apr 8, 2026

Authorization bypass in Contest Gallery 28.0.2 and earlier allows remote attackers to alter gallery metadata through an AJAX action. The plugin exposes cg_check_wp_admin_upload_v10 to unauthenticated requests and executes it without a capability check or nonce validation. No account is required; the action can inject existing WordPress media attachments into galleries and change gallery metadata, but cannot move or upload files.

CVSS severity5.3
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Contest Gallery 28.0.2 and earlier allows remote attackers to alter gallery metadata through an AJAX action. The plugin exposes cg_check_wp_admin_upload_v10 to unauthenticated requests and executes it without a capability check or nonce validation. No account is required; the action can inject existing WordPress media attachments into galleries and change gallery metadata, but cannot move or upload files.

The record

CVE
CVE-2025-12849
Published
Nov 15, 2025
Updated
Apr 8, 2026
Vendor
Contest Gallery
Product
Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe
Classifications
CWE-862, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=28.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Contest Gallery · Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripeversion=0 <=28.0.2

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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