WP Travel < 11.8.1 - Unauthenticated Payment Bypass via Forged PayPal IPN
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 · CISA ADP. Fix status from CNA. Impact type from CWE-290.
Summary
The WP Travel WordPress plugin before 11.8.1 does not verify PayPal Instant Payment Notifications through the PayPal post-back handshake before marking a booking paid, allowing unauthenticated attackers to forge a notification that flips an arbitrary pending booking to a paid and booked state at an attacker-chosen amount.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 | WP Travel | before 11.8.1 | 11.8.1 | Patch available | CNA |
- WP Travel VendorUnknown Affected before 11.8.1 Fixed in 11.8.1 Patch available CNA
Remediation
- Fix · CNA WP Travel (Unknown) Fixed in 11.8.1
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
WP Travel 11.8.1
2 records Highest priority Priority MEDIUM 2 MEDIUM
Other records, highest priority first
- TI-2026-11162 WP Travel < 11.8.1 - Subscriber+ Booking PII Disclosure via IDORPriority MEDIUM 53
Timeline
- 2026-10-02 Threatist record created from CVE-2026-13143
- 2026-10-03 Alias added: GHSA-vx7q-rhxw-6x3x
References
Sources
- CVE-2026-13143 · CVE Program
- CVE-2026-13143 · NVD
- FIRST EPSS
- GHSA-vx7q-rhxw-6x3x · GitHub Advisory Database · CC BY 4.0
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