CVE-2026-87115 json
VikAppointments Services Booking Calendar <= 1.2.21 - Unauthenticated Arbitrary File Deletion via 'old_vapcfN' Parameter
published last mo. modified last mo. 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 60%
- 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.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- last mo.
Exploit prediction
0.90% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-11).
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
- Technology feeds
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
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