BigBlueButton is an open source web conferencing system. Starting with version 2.2 and prior to versions 2.3.9 and 2.4-beta-1, an attacker can circumvent access controls to obtain the content of public chat messages from different meetings on the server. The attacker must be a participant in a meeting on the server. BigBlueButton versions 2.3.9 and 2.4-beta-1 contain a patch for this issue. There are currently no known workarounds.

BigBlueButton is an open source web conferencing system. Versions starting with 2.2 and prior to 2.3.19, 2.4.7, and 2.5.0-beta.2 are vulnerable to regular expression denial of service (ReDoS) attacks. By using specific a RegularExpression, an attacker can cause denial of service for the bbb-html5 service. The useragent library performs checking of device by parsing the input of User-Agent header and lets it go through lookupUserAgent() (alias of useragent.lookup() ). This function handles input by regexing and attackers can abuse that by providing some ReDos payload using `SmartWatch`. The maintainers removed `htmlclient/useragent` from versions 2.3.19, 2.4.7, and 2.5.0-beta.2. As a workaround, disable NginX forwarding the requests to the handler according to the directions in the GitHub Security Advisory.

Cross-Site Request Forgery (CSRF) vulnerability in Social Share Buttons by Supsystic plugin <= 2.2.2 at WordPress.

The Call Now Button WordPress plugin before 1.1.2 does not escape a parameter before outputting it back in an attribute of a hidden input, leading to a Reflected Cross-Site Scripting when the premium is enabled

The Custom TinyMCE Shortcode Button WordPress plugin through 1.1 does not sanitise and escape the PHP_SELF variable before outputting it back in an attribute in an admin page, leading to Reflected Cross-Site Scripting.

The WP Social Buttons WordPress plugin through 2.1 does not sanitise and escape its settings, allowing high privilege users such as admin to perform cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

The Buffer Button WordPress plugin through 1.0 was vulnerable to Authenticated Stored Cross Site Scripting (XSS) within the Twitter username to mention text field.

Numerous Plugins and Themes from the AccessPress Themes (aka Access Keys) vendor are backdoored due to their website being compromised. Only plugins and themes downloaded via the vendor website are affected, and those hosted on wordpress.org are not. However, all of them were updated or removed to avoid any confusion

Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.

The Button Generator WordPress plugin before 2.3.3 within the wow-company admin menu page allows to include() arbitrary file with PHP extension (as well as with data:// or http:// protocols), thus leading to CSRF RCE.