WWBN AVideo: IDOR in PayPalYPT agreementCancel.json.php Allows Any Authenticated User to Cancel Arbitrary PayPal Subscription Agreements

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Summary

CVECVE-2026-43883
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-11 22:22:12 UTC
Updated2026-05-12 18:17:28 UTC
DescriptionWWBN 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.

Risk And Classification

Primary CVSS: v3.1 4.2 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

Problem Types: CWE-639 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
3.1CNADECLARED4.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA WWBN AVideo affected <= 29.0 Not specified

References

ReferenceSourceLinkTags
github.com/WWBN/AVideo/security/advisories/GHSA-958h-qp3x-q4gj 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/WWBN/AVideo/commit/0da3dcff1eda2f497694bf82b559829471c292c2 [email protected] github.com
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