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CVE-2026-43883

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

Published: May 11, 2026Updated: May 12, 2026 Sources: CVE List NVDCWE-639
NVD MITRE
4.2CVSSMEDIUM
EPSS Score
0.2%
Top 93.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:NI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-639

Affected Products

AVideoWWBNWeb & CMS Plugins
wwbncommercialWeb & CMS Plugins

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Initial Access
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References

https://github.com/WWBN/AVideo/commit/0da3dcff1eda2f497694bf82b559829471c292c2
github.com
https://github.com/WWBN/AVideo/security/advisories/GHSA-958h-qp3x-q4gj
github.com

Timeline

Published
May 11, 2026
Last Updated
May 12, 2026

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