Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 28.2%
CVSS Severity
CVSS v3 Score 6.1
CVSS v2 Score 4.3
References
Products affected by CVE-2021-24535
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cpe:2.3:a:light_messages_project:light_messages:-
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cpe:2.3:a:light_messages_project:light_messages:1.0