Improper Payment Verification in Paymattic Plugin by WordPress
CVE-2026-89411
5.3MEDIUM
Key Information:
Badges
👾 Exploit Exists🟡 Public PoC
What is CVE-2026-89411?
The Paymattic WordPress plugin versions prior to 4.6.26 are affected by a flaw that fails to properly verify that a confirmed Stripe payment corresponds to the intended order. This vulnerability allows unauthenticated users to mark any pending order as paid by creating a smaller payment of their choosing, which can lead to unintended financial repercussions and compromise the integrity of payment processing on the platform.
Affected Version(s)
Paymattic 4.6.20 < 4.6.26
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
References
CVSS V3.1
Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged
Timeline
- 🟡
Public PoC available
- 👾
Exploit known to exist
Vulnerability published
Vulnerability Reserved
Credit
Artus KG
WPScan