CVE-2021-24808 BP Better Messages < 1.9.9.41 - Reflected Cross-Site Scripting

What is CVE-2021-24808?

CVE-2021-24808 is a medium-severity cross-site scripting vulnerability in Unknown BP Better Messages, published on 1 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The BP Better Messages WordPress plugin before 1.9.9.41 sanitise (with sanitize_text_field) but does not escape the 'subject' parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting issue

Weakness: CWE-79

Which versions are affected by CVE-2021-24808?

It affects 1 product.

Products include Wordplus Better Messages.

How do I fix CVE-2021-24808?

No fix has been published for CVE-2021-24808 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-2021-24808 being exploited?

There is no known exploitation of CVE-2021-24808 in the wild and no public exploit code.

Other vulnerabilities in Unknown BP Better Messages

• CVE-2021-24809 BP Better Messages < 1.9.9.41 - Multiple CSRF High 8.8
• CVE-2022-33142 WordPress Better Messages plugin <= 1.9.10.57 - Denial Of Service (DoS) vulnerability High 7.7
• CVE-2024-13611 Information disclosure in Better Messages – Live Chat, Chat Rooms, Real-Time Messaging & Private Messages High 7.5
• CVE-2023-49168 WordPress BP Better Messages Plugin <= 2.4.0 is vulnerable to Cross Site Scripting (XSS) Medium 6.5
• CVE-2024-13612 Cross-site scripting in Better Messages – Live Chat, Chat Rooms, Real-Time Messaging & Private Messages Medium 6.4

Sources

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

Also known as GHSA-g5jj-wf98-76w5.