Bookly < 28.3 - Unauthenticated Payment Bypass via Booking Price Manipulation
Priority LOW 30CWE-472Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
The Bookly WordPress plugin before 28.3 does not validate client-supplied booking quantity values on the server before computing the appointment total, allowing unauthenticated users to reduce the total to zero and book paid services for free while bypassing the payment step.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00245 15th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Bookly (Unknown): 28.3
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 | Bookly | before 28.3 | 28.3 | Patch available | CNA |
- Bookly VendorUnknown Affected before 28.3 Fixed in 28.3 Patch available CNA
Remediation
- Fix · CNA Bookly (Unknown) Fixed in 28.3
Timeline
- 2026-10-02 Threatist record created from CVE-2026-86838
- 2026-10-03 Alias added: GHSA-8vmp-w5gv-wxrj
References
Sources
- CVE-2026-86838 · CVE Program
- CVE-2026-86838 · NVD
- FIRST EPSS
- GHSA-8vmp-w5gv-wxrj · 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