mycontacts.php in V3 Chat allows remote authenticated users to gain privileges as other users via a modified membername parameter.

Cross-site scripting (XSS) vulnerability in memcp.php in XMB U2U Instant Messenger allows remote authenticated users to inject arbitrary web script or HTML via the recipient field.

Shape Services IM+ Mobile Instant Messenger for Pocket PC 3.10 stores usernames and passwords in plaintext in %PROGRAMFILES%\IMPlus\implus.cfg, which allows local users to obtain sensitive information by reading the file.

SQL injection vulnerability in php121language.php in PHP121 1.4 allows remote attackers to execute arbitrary SQL commands and execute arbitrary code via the sess_username variable, as set by the php121un HTTP COOKIE parameter, which is used in multiple files including php121login.php. NOTE: the code execution occurs because the SQL query results are used in an include statement.

Unspecified vulnerability in AOL Instant Messenger (AIM) 5.9.3861 allows user-assisted remote attackers to cause a denial of service (client crash) and possibly execute arbitrary code by tricking the user into requesting Buddy Info about a long screen name, which might cause a buffer overflow.

Stack-based buffer overflow in Gadu-Gadu 7.20 allows remote attackers to cause a denial of service (crash) via an image filename between exactly 192 to 200 characters, which does not account for the "imgcache\" string that is added to the end of the buffer.

Gadu-Gadu 7.20 does not properly handle MS-DOS device names in filenames, which allows remote attackers to (1) cause a denial of service (hang) via an image filename of AUX: sent twice (hang), or (2) write to the LPT1 port via a filename of "LPT1:".

Gadu-Gadu 7.20 allows remote attackers to eavesdrop on a user via a web page that accesses the EasycallLite.oce ActiveX control, which can initiate an outgoing phone call and listen to the microphone.

Gadu-Gadu 7.20 allows remote attackers to cause a denial of service (crash and configuration loss) via a page with a large number of gg: URIs.

Memory leak in Gadu-Gadu 7.20 allows remote attackers to cause a denial of service via multiple DCC packets with a code other than 2 and a large size field, which allocates memory for the packet but does not free it after the packet has been dropped.