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mime.php in SquirrelMail through 1.4.23-svn-20250401 and 1.5.x through 1.5.2-svn-20250401 allows XSS via e-mail headers, because JavaScript payloads are mishandled after $encoded has been set to true.
Reserved 2025-03-17 | Published 2025-04-02 | Updated 2025-04-02 | Assigner mitreCWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
squirrelmail.org/security/issue.php?d=2025-04-02
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