CVE-2026-43883 Details
Description
WWBN AVideo is an open source video platform. In versions up to and including 29.0, plugin/PayPalYPT/agreementCancel.json.php cancels a PayPal billing agreement using an attacker-supplied agreement parameter without verifying that the authenticated user owns the agreement. A low-privilege authenticated user who learns or obtains another user's PayPal billing agreement ID can silently suspend the victim's recurring subscription, causing revenue loss to the platform and loss of paid service to the victim. Commit 0da3dcff1eda2f497694bf82b559829471c292c2 contains an updated fix.
A vulnerability in WWBN AVideo versions through 29.0 allows low-privilege authenticated users to cancel arbitrary PayPal billing agreements. The issue arises in the `plugin/PayPalYPT/agreementCancel.json.php` file, where the cancellation process does not verify if the user requesting the cancellation actually owns the agreement. This oversight enables a user to suspend another user's subscription, leading to potential revenue loss for the platform and disruption of service for the affected user.
The vulnerability has been patched in commit 0da3dcff1eda2f497694bf82b559829471c292c2, which adds the necessary ownership verification to the cancellation process.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 11, 2026CISA-ADP
Assessed May 12, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/WWBN/AVideo/security/advisories/GHSA-958h-qp3x-q4gj | CISA-ADP | AdvisoryRemedyVendor |
| https://github.com/WWBN/AVideo/commit/0da3dcff1eda2f497694bf82b559829471c292c2 | [email protected] | Source CodeVendor |
| https://github.com/WWBN/AVideo/security/advisories/GHSA-958h-qp3x-q4gj | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| WWBN AVideo | <= 29.0 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 12, 2026 | CVE Modified | CISA-ADP |
| May 11, 2026 | New CVE Received | [email protected] |