CVE-2021-24535

Public Exploit

Light Messages <= 1.0 - CSRF to Stored XSS

Description

The Light Messages WordPress plugin through 1.0 is lacking CSRF check when updating it's settings, and is not sanitising its Message Content in them (even with the unfiltered_html disallowed). As a result, an attacker could make a logged in admin update the settings to arbitrary values, and set a Cross-Site Scripting payload in the Message Content. Depending on the options set, the XSS payload can be triggered either in the backend only (in the plugin's settings), or both frontend and backend.

References

Link	Tags
https://wpscan.com/vulnerability/351de889-9c0a-4637-bd06-0e1fe1d7e89f	third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-24535?: CVE-2021-24535 has been scored as a medium severity vulnerability.
How to fix CVE-2021-24535?: To fix CVE-2021-24535, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-24535 being actively exploited in the wild?: It is possible that CVE-2021-24535 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-24535?: CVE-2021-24535 affects Unknown Light Messages.

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Description

Category

CWE-79 – Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

Frequently Asked Questions