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CVE-2026-12688— ProfileGrid < 5.9.9.7 - Unauthenticated Payment Bypass and Forced Group Membership via PayPal IPN Forgery

Quick assessment

Affected
Unknown ProfileGrid
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.

metagauss profilegrid是metagauss个人开发者开源的一套用户管理插件。 WordPress ProfileGrid 5.9.9.7之前版本存在权限许可和访问控制问题漏洞，该漏洞源于未验证PayPal IPN通知，导致未认证攻击者可伪造支付通知，无需支付即可将任何用户标记为任何群的付费成员。

AI Predicted 9.1 Difficulty: Easy EPSS 0.27% · P20

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown ProfileGrid < 5.9.9.7 affected
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I. Basic Information for CVE-2026-12688

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
ProfileGrid < 5.9.9.7 - Unauthenticated Payment Bypass and Forced Group Membership via PayPal IPN Forgery
Source: CVE Program / CVE List V5
Vulnerability Description
The ProfileGrid WordPress plugin before 5.9.9.7 does not verify PayPal IPN notifications before granting paid group membership, allowing unauthenticated attackers to forge a payment notification and mark any user as a paid member of any group without any payment being made.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress ProfileGrid 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
metagauss profilegrid是metagauss个人开发者开源的一套用户管理插件。 WordPress ProfileGrid 5.9.9.7之前版本存在权限许可和访问控制问题漏洞，该漏洞源于未验证PayPal IPN通知，导致未认证攻击者可伪造支付通知，无需支付即可将任何用户标记为任何群的付费成员。
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
Unknown ProfileGrid 0 ~ 5.9.9.7 -

II. Public POCs for CVE-2026-12688

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-12688

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Vendor Advisories for CVE-2026-12688 (1)

Same Patch Batch · Unknown · 2026-07-24 · 7 CVEs total

CVE-2026-14603 WowOptin < 1.4.38 - Unauthenticated Opt-in Deactivation and Template Row Injection
CVE-2026-12689 ProfileGrid < 5.9.9.7 - Subscriber+ Cross-User Private Message Thread Deletion and Tamperi
CVE-2026-12690 ProfileGrid < 5.9.9.7 - Subscriber+ Premium License Tampering via Missing Authorization
CVE-2026-12981 CAFEHAUS API <= 1.0.0 - Unauthenticated Arbitrary User Password Reset
CVE-2026-12877 Software Issue Manager < 5.1.0 - Unauthenticated SQL Injection via Search Parameter
CVE-2026-12497 ProfilePress < 4.16.18 - Unauthenticated Privilege Escalation via Registration Role Select

IV. Related Vulnerabilities

Same product: ProfileGrid
Same vendor: Unknown