Multiple cross-site scripting (XSS) vulnerabilities in Squirrelmail 1.2.10 and earlier allow remote attackers to inject arbitrary HTML or script via (1) the $mailer variable in read_body.php, (2) the $senderNames_part variable in mailbox_display.php, and possibly other vectors including (3) the $event_title variable or (4) the $event_text variable.
https://exchange.xforce.ibmcloud.com/vulnerabilities/16285
http://www.rs-labs.com/adv/RS-Labs-Advisory-2004-1.txt
http://www.debian.org/security/2004/dsa-535
http://marc.info/?l=bugtraq&m=108611554415078&w=2
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000858