Vulnerabilities

CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.

WebDAV implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to XXE injection.

yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.

yaws before 2.0.4 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not protect CGI applications from the presence of untrusted client data in the HTTP_PROXY environment variable,…

Yaws 1.91 has a directory traversal vulnerability in the way certain URLs are processed.

Yaws 1.91 allows Unauthenticated Remote File Disclosure via HTTP Directory Traversal with /%5C../ to port 8080.

Multiple cross-site scripting (XSS) vulnerabilities in the wiki application in Yaws 1.88 allow remote attackers to inject arbitrary web script or HTML via (1) the tag parameter to editTag.yaws, (2) the index parameter to…

Directory traversal vulnerability in Yaws 1.89 allows remote attackers to read arbitrary files via ..\ (dot dot backslash) and other sequences.

Yaws 1.85 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP reque…

Yaws before 1.80 allows remote attackers to cause a denial of service (memory consumption and crash) via a request with a large number of headers.

Yaws Webserver 1.55 and earlier allows remote attackers to obtain the source code for yaws scripts via a request to a yaw script with a trailing %00 (null).