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CVE-2026-92798— User Registration & Membership <= 5.2.8 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via Referer Header via 'referrer_url' Smart Tag

Quick assessment

Affected
wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
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.

WordPress 的"User Registration & Membership"插件在 5.2.8 及更早版本中存在任意短代码执行漏洞。该漏洞源于 方法中 分支的输入清理不足：攻击者可控的 HTTP_REFERER 请求头仅经过 函数处理（该函数不会移除 WordPress 短代码分隔符），随后便被代入内容限制消息中，并通过 或 函数执行。这使得未认证的攻击者能够在任何使用了受支持的 智能标签的内容限制消息的受限页面上，执行任意已注册的短代码。

CVSS 8.1 · High
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I. Basic Information for CVE-2026-92798

Vulnerability Information
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Vulnerability Title
User Registration & Membership <= 5.2.8 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via Referer Header via 'referrer_url' Smart Tag
Source: CVE Program / CVE List V5
Vulnerability Description
The User Registration & Membership plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to, and including, 5.2.8 This is due to insufficient input sanitization in the 'referrer_url' branch of UR_Smart_Tags::process(), where the attacker-controlled HTTP_REFERER header is only passed through sanitize_text_field() — which does not strip WordPress shortcode delimiters — before being substituted into a Content Restriction message that is subsequently executed via apply_shortcodes()/do_shortcode(). This makes it possible for unauthenticated attackers to execute arbitrary registered shortcodes on any restricted page whose message uses the supported {{referrer_url}} smart tag.
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:N
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder 0 ~ 5.2.8 -

II. Public POCs for CVE-2026-92798

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III. Intelligence Information for CVE-2026-92798

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Patches & Fixes for CVE-2026-92798 (1)

Other References for CVE-2026-92798 (5)

Same Patch Batch · wpeverest · 2026-10-17 · 3 CVEs total

CVE-2026-96660 7.2 HIGH User Registration & Membership <= 5.2.8 - Unauthenticated Stored Cross-Site Scripting via
CVE-2026-92978 4.3 MEDIUM User Registration & Membership <= 5.2.8 - Cross-Site Request Forgery to trigger_bulk_actio

IV. Related Vulnerabilities

Same product: User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
Same vendor: wpeverest
Same weakness: CWE-94

V. Comments for CVE-2026-92798

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