Authorization bypass in properfraction Paid Membership Plugin, Ecommerce, User…
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
The ProfilePress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.16.11. This is due to missing ownership validation on the change_plan_sub_id parameter in the process_checkout() function. The ppress_process_checkout AJAX handler accepts a user-controlled subscription ID intended for plan upgrades, loads the subscription record, and cancels/expires it without verifying the subscription belongs to the requesting user. This makes it possible for authenticated attackers, with Subscriber-level access and above, to cancel and expire any other user's active subscription via the change_plan_sub_id parameter during checkout, causing immediate loss of paid access for victims.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| properfraction | Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress | up to 4.16.11 | — | No fix listed | CNA |
- Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress Vendorproperfraction Affected up to 4.16.11 Fixed in — No fix listed CNA
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:properfraction:profilepress:*:*:*:*:*:*:*:* | — | — | properfraction |
- cpe:2.3:a:properfraction:profilepress:*:*:*:*:*:*:*:* Versions — — ·properfraction
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-3453
- 2026-10-03 Alias added: GHSA-jp3m-m8r2-v4x3
References
Other 5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/74e4808f-bd6f-4e62-91cb-31c86a427498?source=cve
- https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.16.9/src/Membership/Controllers/CheckoutController.php#L237
- https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.16.9/src/Membership/Controllers/CheckoutController.php#L334
- https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.16.9/src/Membership/Controllers/CheckoutController.php#L342
- https://plugins.trac.wordpress.org/changeset/3474509/wp-user-avatar/trunk/src/Membership/Controllers/CheckoutController.php
More properfraction vulnerabilities
- TI-2021-13635 ProfilePress 3.0 - 3.1.3 - Unauthenticated Privilege Escalation CVSS 3.1CRITICAL 9.8
- TI-2021-13638 ProfilePress 3.0 - 3.1.3 - Arbitrary File Upload in File Uploader Component CVSS 3.1CRITICAL 9.8
- TI-2021-13637 ProfilePress 3.0 - 3.1.3 - Arbitrary File Upload in Image Uploader Component CVSS 3.1CRITICAL 9.8
- TI-2021-13636 ProfilePress 3.0 - 3.1.3 - Authenticated Privilege Escalation CVSS 3.1CRITICAL 9.8
- TI-2024-12168 ProfilePress < 4.15.20 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
- TI-2024-12167 ProfilePress < 4.15.20 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
Sources
- CVE-2026-3453 · CVE Program
- CVE-2026-3453 · NVD
- FIRST EPSS
- GHSA-jp3m-m8r2-v4x3 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences