CVE-2026-14827

Calendar < 1.3.18 - Contributor+ Stored XSS via event_link Parameter

The Calendar WordPress plugin before 1.3.18 does not properly escape a user-supplied event field before outputting it inside an HTML attribute on a public-facing page, allowing users with the Contributor role to inject arbitrary JavaScript that executes in the browser of anyone viewing the calendar.

Affected

Calendar

CVSS v3.1 CNA

6.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

EPSS

0.43% chance of exploitation in the next 30 days, 36th percentile

Published

2026-07-27

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/b2981b41-b712-43d9-a327-3a376346cec5/

References

• CVE Record
• NVD entry