← Vulnerability feed

Vulnerability record · CVE-2026-86838 · published 28 September 2026

CVE-2026-86838: The Bookly WordPress plugin before 28.3 does not validate client-supplied booking quantity values on the serve…

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.

5.3 CVSS 3.1 Medium CWE-472 · CWE-472 Deferred
5.3CVSS 3.1 base score
—EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
28 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

LinkTags
https://wpscan.com/vulnerability/1c8a53e7-5556-4dcb-a461-c6df253d0b7a/

Track CVE-2026-86838 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

6.9CVE-2025-35939Craft CMS unauthenticated session file write enables PHP code injectionCraft CMS stores unsanitized client-supplied return URL values in server-side session files for unauthenticated users. Because the session file path …KEVEPSS 1.3%analysed

Source: NIST National Vulnerability Database (record CVE-2026-86838), CISA KEV, FIRST EPSS. This page is refreshed as NVD updates the record.