CVE-2021-24687 Modern Events Calendar Lite < 5.22.2 - Admin+ Stored Cross-Site Scripting

What is CVE-2021-24687?

CVE-2021-24687 is a medium-severity cross-site scripting vulnerability in Unknown Modern Events Calendar Lite, published on 4 Oct 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

The Modern Events Calendar Lite WordPress plugin before 5.22.2 does not escape some of its settings before outputting them in attributes, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

Weakness: CWE-79

Which versions are affected by CVE-2021-24687?

It affects 1 product.

Products include Webnus Modern Events Calendar Lite.

How do I fix CVE-2021-24687?

No fix has been published for CVE-2021-24687 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-2021-24687 being exploited?

There is no known exploitation of CVE-2021-24687 in the wild and no public exploit code.

Other vulnerabilities in Unknown Modern Events Calendar Lite

• CVE-2021-24946 Modern Events Calendar < 6.1.5 - Unauthenticated Blind SQL Injection Critical 9.8
• CVE-2021-24149 Modern Events Calendar Lite < 5.16.6 - Authenticated SQL Injection High 8.8
• CVE-2021-24146 Modern Events Calendar Lite < 5.16.5 - Unauthenticated Events Export High 7.5
• CVE-2021-24145 Modern Events Calendar Lite < 5.16.5 - Authenticated Arbitrary File Upload leading to RCE High 7.2
• CVE-2021-24925 Modern Events Calendar Lite < 6.1.5 - Reflected Cross-Site Scripting Medium 6.1

Sources

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

Also known as GHSA-vvvh-5w82-4q4g.