FeHelper through 2019-06-19 allows arbitrary code execution during a JSON format operation, as demonstrated by the {"a":(function(){confirm(1)})()} input.

In wallpaper.c in feh before v2.18.3, if a malicious client pretends to be the E17 window manager, it is possible to trigger an out-of-boundary heap write while receiving an IPC message. An integer overflow leads to a buffer overflow and/or a double free.

feh before 1.8, when the --wget-timestamp option is enabled, might allow remote attackers to execute arbitrary commands via shell metacharacters in a URL.

The feh_unique_filename function in utils.c in feh 1.11.2 and earlier might allow local users to create arbitrary files via a symlink attack on a /tmp/feh_ temporary file, a different vulnerability than CVE-2011-0702.

The feh_unique_filename function in utils.c in feh before 1.11.2 might allow local users to overwrite arbitrary files via a symlink attack on a /tmp/feh_ temporary file.

SafeHTML before 1.3.5 does not properly filter script in UTF-7 and CSS comments, which allows remote attackers to conduct cross-site scripting (XSS) attacks in vulnerable applications that use SafeHTML.

The _writeAttrs function in SafeHTML before 1.3.2 does not properly handle quotes in attribute values, which could allow remote attackers to exploit cross-site scripting (XSS) vulnerabilities in applications that rely on SafeHTML for protection.

Multiple vulnerabilities in Pixel-Apes SafeHTML before 1.3.0 allow remote attackers to bypass cross-site scripting (XSS) protection via (1) "decimal HTML entities" or (2) "the \x00 symbol."

Pixel-Apes SafeHTML before 1.2.1 allows remote attackers to bypass cross-site scripting (XSS) protection via "hexadecimal HTML entities."