CVE-2024-8493 The Events Calendar < 6.6.4 - Admin+ Stored XSS

What is CVE-2024-8493?

CVE-2024-8493 is a medium-severity cross-site scripting vulnerability in Unknown The Events Calendar, published on 15 May 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

The Events Calendar WordPress plugin before 6.6.4 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

Weakness: CWE-79

Which versions are affected by CVE-2024-8493?

It affects 1 product.

Products include Stellarwp the Events Calendar.

How do I fix CVE-2024-8493?

No fix has been published for CVE-2024-8493 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2024-8493 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-8493 exists.

Other vulnerabilities in Unknown The Events Calendar

• CVE-2024-8275 The Events Calendar <= 6.6.4 - Unauthenticated SQL Injection Critical 9.8
• CVE-2024-4180 The Events Calendar < 6.4.0.1 - Reflected XSS Critical 9.1
• CVE-2023-6203 The Events Calendar < 6.2.8.1 - Unauthenticated Arbitrary Password Protected Post Read High 7.5
• CVE-2024-6931 The Events Calendar <= 6.6.3 - Unauthenticated Stored Cross-Site Scripting High 7.2
• CVE-2025-5144 The Events Calendar <= 6.13.2 - Authenticated (Contributor+) DOM-Based Stored Cross-Site Scripting Medium 6.4

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-xc5x-xvcr-5h87.