CVE-2021-24535

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.

CVSS v3.1

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v2.0

4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N

EPSS

0.41% chance of exploitation in the next 30 days, 34th percentile

Published

2021-08-16

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/351de889-9c0a-4637-bd06-0e1fe1d7e89f

References

• CVE Record
• NVD entry

Related

• CVE-2021-24534
• CVE-2021-24536
• CVE-2021-24533
• CVE-2021-24537
• CVE-2021-24530
• CVE-2021-24538