UI/Manage.pm in Foswiki 1.1.0 and 1.1.1 allows remote authenticated users to gain privileges by modifying the GROUP and ALLOWTOPICCHANGE preferences in the topic preferences for Main.AdminGroup.

Multiple cross-site scripting (XSS) vulnerabilities in UI/Register.pm in Foswiki before 1.1.5 allow remote authenticated users with CHANGE privileges to inject arbitrary web script or HTML via the (1) text, (2) FirstName, (3) LastName, (4) OrganisationName, (5) OrganisationUrl, (6) Profession, (7) Country, (8) State, (9) Address, (10) Location, (11) Telephone, (12) VoIP, (13) InstantMessagingIM, (14) Email, (15) HomePage, or (16) Comment parameter. NOTE: some of these details are obtained from third party information.

The localization functionality in TWiki before 5.1.3, and Foswiki 1.0.x through 1.0.10 and 1.1.x through 1.1.6, allows remote attackers to cause a denial of service (memory consumption) via a large integer in a %MAKETEXT% macro.

Foswiki before 1.1.8 contains a code injection vulnerability in the MAKETEXT macro.

Insufficient parameter validation in the Foswiki::Sandbox component of Foswiki v2.1.7 and below allows attackers to perform a directory traversal via supplying a crafted web request.

An issue in the SpreadSheetPlugin component of Foswiki v2.1.7 and below allows attackers to execute a directory traversal.

A vulnerability was detected in Foswiki up to 2.1.10. The affected element is an unknown function of the component Changes/Viewfile/Oops. The manipulation results in information disclosure. It is possible to launch the attack remotely. The exploit is now public and may be used. Upgrading to version 2.1.11 is sufficient to fix this issue. The patch is identified as 31aeecb58b64/d8ed86b10e46. Upgrading the affected component is recommended.