CVE-2026-87115 json
VikAppointments Services Booking Calendar <= 1.2.21 - Unauthenticated Arbitrary File Deletion via 'old_vapcfN' Parameter
published 2026-10-03 36 d ago modified 2026-10-06 33 d ago also EUVD-2026-91958
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
Summary
The VikAppointments Services Booking Calendar plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the extract function in all versions up to, and including, 1.2.21. This makes it possible for unauthenticated attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). Exploitation requires at least one File-type custom field to be published on the confirmation page shortcode, as this field is not created by default during plugin installation.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 36 d ago
Exploit prediction
0.90% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
Affected products
- e4jvikwp VikAppointments Services Booking Calendar
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
- wordfence.com /threat-intel/vulnerabilities/id/75fc5df5-a774-4fe1-8452-d35ba7b69081?source=cve
- plugins.trac.wordpress.org /browser/vikappointments/tags/1.2.19/site/helpers/libraries/customfields/types/file.php#L53
- plugins.trac.wordpress.org /browser/vikappointments/tags/1.2.19/site/helpers/libraries/customfields/types/file.php#L131
- plugins.trac.wordpress.org /browser/vikappointments/tags/1.2.19/site/controllers/confirmapp.php#L88
- plugins.trac.wordpress.org /browser/vikappointments/tags/1.2.19/vikappointments.php#L237
- plugins.trac.wordpress.org /browser/vikappointments/tags/1.2.21/site/helpers/libraries/customfields/types/file.php#L131
- plugins.trac.wordpress.org /browser/vikappointments/tags/1.2.21/site/helpers/libraries/customfields/types/file.php#L53
- plugins.trac.wordpress.org /browser/vikappointments/tags/1.2.21/site/controllers/confirmapp.php#L88
- plugins.trac.wordpress.org /browser/vikappointments/tags/1.2.21/vikappointments.php#L237
- plugins.trac.wordpress.org /changeset?reponame=&old=3721264%40vikappointments&new=3721264%40vikappointments
Sources
- CVE List CVE-2026-87115
- NVD CVE-2026-87115
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.