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CVE-2026-12165— Contest Gallery <= 30.0.2 - Authenticated (Author+) Privilege Escalation via 'RegistryUserRole' Parameter

Quick assessment

Affected
contest-gallery Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

contest-gallery contest gallery是contest-gallery个人开发者开源的一个创建和管理竞赛图片展示的插件。 contest gallery 30.0.2及之前版本存在权限许可和访问控制问题漏洞，该漏洞源于通过 参数存在权限提升， 中选项保存处理程序未进行充分的权限检查，且对 值的处理仅限于 和`htm

CVSS 8.8 · High EPSS 0.40% · P31

Affected Version Matrix 1

VendorProduct Version RangeStatus
contest-gallery Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe ≤ 30.0.2 affected
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I. Basic Information for CVE-2026-12165

Vulnerability Information
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Vulnerability Title
Contest Gallery <= 30.0.2 - Authenticated (Author+) Privilege Escalation via 'RegistryUserRole' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 30.0.2 via the `RegistryUserRole` parameter. This is due to the plugin's admin menu being registered at the `edit_posts` capability level — granting Contributor-level users access to the plugin's admin pages and a valid `cg_admin` nonce — while the option-saving handler in `change-options-and-sizes.php` performs no `current_user_can()` capability check beyond `check_admin_referer('cg_admin')`, and the `RegistryUserRole` value is processed only through `sanitize_text_field()` and `htmlentities()` without restriction to an allowlist of permitted role names. This makes it possible for authenticated attackers, with author-level access and above, to overwrite the plugin's stored `RegistryUserRole` option with `administrator`, which the `cg_create_wp_user_from_google_user` function then reads back from the `contest_gal1ery_registry_and_login_options` database table without any allowlist validation and passes directly to `wp_update_user()`, effectively promoting a newly registered Google sign-in account to Administrator.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
contest gallery 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
contest-gallery contest gallery是contest-gallery个人开发者开源的一个创建和管理竞赛图片展示的插件。 contest gallery 30.0.2及之前版本存在权限许可和访问控制问题漏洞，该漏洞源于通过`RegistryUserRole`参数存在权限提升，`change-options-and-sizes.php`中选项保存处理程序未进行充分的权限检查，且对`RegistryUserRole`值的处理仅限于`sanitize_text_field()`和`htm
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
contest-gallery Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe 0 ~ 30.0.2 -

II. Public POCs for CVE-2026-12165

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III. Intelligence Information for CVE-2026-12165

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Patches & Fixes for CVE-2026-12165 (1)

News Coverage for CVE-2026-12165 (1)

IV. Related Vulnerabilities

Same product: Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe
Same vendor: contest-gallery
Same weakness: CWE-269

V. Comments for CVE-2026-12165

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