Quick answers
- Is CVE-2026-27377 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-27377 being exploited in the wild.
- How severe is CVE-2026-27377?
- Medium severity, with a CVSS score of 6.7, published 23 July 2026.
- Which products and versions are affected?
- Axiomthemes QuickCal <= 1.0.16.
- Is there a fix for CVE-2026-27377?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-27377 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-27377?
- Check whether you run Axiomthemes QuickCal at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A broken access control vulnerability (CWE-862: Missing Authorization) exists in the QuickCal plugin for WordPress through version 1.0.16. The flaw resides in the handling of booking agent permissions, where the application fails to properly validate authorization for certain functions. An attacker with high-level privileges (specifically the 'Booking Agent' role) can exploit this over a network without user interaction to gain unauthorized access to data or modify settings. As of the advisory date, no official patch has been released.
Affected products
- AxiomThemes / Pixel Makers Creative INC. QuickCal - Appointment Booking Calendar for WordPress <= 1.0.16
Timeline
- 2025-11-21: other: Vulnerability reported by researcher Phat RiO
- 2026-07-22: advisory: Patchstack advisory published
- 2026-07-23: disclosed: CVE published to NVD dataset