Vignette StoryServer 4 and 5, and Vignette V/5 and V/6, with the SSI EXEC feature enabled, allows remote attackers to execute arbitrary code via a text variable to a Vignette Application that is later displayed.
Vignette StoryServer 4 and 5, Vignette V/5, and possibly other versions allows remote attackers to perform unauthorized SELECT queries by setting the vgn_creds cookie to an arbitrary value and directly accessing the save template.
Vignette StoryServer and Vignette V/5 does not properly calculate the size of text variables, which causes Vignette to return unauthorized portions of memory, as demonstrated using the "-->" string in a CookieName argument to the login template, referred to as a "memory leak" in some reports.
The default login template (/vgn/login) in Vignette StoryServer 5 and Vignette V/5 generates different responses whether a user exists or not, which allows remote attackers to identify valid usernames via brute force attacks.
Vignette StoryServer 5 and Vignette V/5 allows remote attackers to read and modify license information, and cause a denial of service (service halt) by directly accessing the /vgn/license template.
Multiple Cross Site Scripting (XSS) vulnerabilities in Vignette StoryServer 4 and 5, and Vignette V/5 and V/6, allow remote attackers to insert arbitrary HTML and script via text variables, as demonstrated using the errInfo parameter of the default login template.