What is CVE-2026-77187?

CVE-2026-77187 is a medium-severity vulnerability in Joedolson My Calendar – Accessible Event Manager, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-09-09.

How severe is CVE-2026-77187?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Joedolson My Calendar – Accessible Event Manager

CVE-2026-77187

The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'before' and 'after' Shortcode Attributes in all versions up to, and including, 3.8.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Joedolson My Calendar – Accessible Event Manager

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-77187?: CVE-2026-77187 is a medium-severity vulnerability in Joedolson My Calendar – Accessible Event Manager, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-09-09.
How severe is CVE-2026-77187?: Medium severity. CVSS v3 base score is 6.4 out of 10.