Paymattic < 4.6.26 - Unauthenticated Payment Bypass via Unbound Stripe PaymentIntent
Priority LOW 29CWE-345Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-345.
Summary
The Paymattic WordPress plugin from 4.6.20 before 4.6.26 does not verify that a confirmed Stripe payment belongs to the order it is applied to, allowing unauthenticated users to mark an arbitrary pending order as paid by confirming a smaller payment of their own against it.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00114 1st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Paymattic (Unknown): 4.6.26
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 |
|---|---|---|---|---|---|
| Unknown | Paymattic | 4.6.20 to before 4.6.26 | 4.6.26 | Patch available | CNA |
- Paymattic VendorUnknown Affected 4.6.20 to before 4.6.26 Fixed in 4.6.26 Patch available CNA
Remediation
- Fix · CNA Paymattic (Unknown) Fixed in 4.6.26
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89411
- 2026-10-03 Alias added: GHSA-xhxc-69hm-mqvf
References
Sources
- CVE-2026-89411 · CVE Program
- CVE-2026-89411 · NVD
- FIRST EPSS
- GHSA-xhxc-69hm-mqvf · 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