CVE-2026-87891 json
Rox Appointment Booking < 1.2.0 - Unauthenticated Holiday Schedule Modification via REST API
published 2026-09-12 57 d ago modified 2026-09-14 55 d ago also EUVD-2026-76802
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
Summary
The Rox Appointment Booking WordPress plugin before 1.2.0 does not perform any capability or authorization check when saving its holiday schedule, allowing unauthenticated attackers to overwrite the dates the booking system treats as unavailable, which can block legitimate bookings or open dates the site owner intended to keep closed.
Patch / fix
- Unknown Rox Appointment Booking 1.2.0
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 57 d ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/e7f3b29e-2503-41bb-b15c-3c0ef71a3a00/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
Affected products
- Unknown Rox Appointment Booking
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
wpscan.com
/vulnerability/e7f3b29e-2503-41bb-b15c-3c0ef71a3a00/
exploit, vdb-entry, technical-description
Sources
- CVE List CVE-2026-87891
- NVD CVE-2026-87891
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.