Bookly < 28.3 - Unauthenticated Customer PII Update via Verification Bypass
Priority LOW 29CWE-639Published · 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-639.
Summary
The Bookly WordPress plugin before 28.3 does not properly verify a customer's identity before updating their stored details, allowing unauthenticated attackers who know a customer's primary identifier to overwrite that customer's stored personal information such as name, email and address.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00207 10th 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-2026-86837
- 2026-10-03 Alias added: GHSA-qqvg-v89g-fp38
References
Sources
- CVE-2026-86837 · CVE Program
- CVE-2026-86837 · NVD
- FIRST EPSS
- GHSA-qqvg-v89g-fp38 · 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