Cross-site Scripting (XSS) - Stored in tsolucio/corebos

Valid

Reported on

Dec 9th 2021


Description

Stored Cross-Site Scripting (XSS) vulnerability due to the lack of content validation and output encoding. This vulnerability can be exploited by uploading a crafted payload inside a document.

Proof of Concept

https://demo.corebos.com/index.php?module=Users&action=index&parenttab=Settings

settings >users >Editing users "Administrator" 
4. Signature  >sources

POC

https://drive.google.com/file/d/1lddcq22RjFDf317inKo_tdPQcMUkeiiE/view?usp=sharing

https://drive.google.com/file/d/1CCyYY44pa2l5Zfge4-FHBNDnpeMKKsOI/view?usp=sharing


XSS Payload

https://drive.google.com/file/d/1qSuKtzButCGbXCHnwFUll3FNJ-gxB-eH/view?usp=sharing

Impact

Stored XSS generally occurs when user input is stored on the target server, such as in a database, in a message forum, visitor log, comment field, etc. And then a victim is able to retrieve the stored data from the web application without that data being made safe to render in the browser.

We are processing your report and will contact the tsolucio/corebos team within 24 hours. a month ago
We have contacted a member of the tsolucio/corebos team and are waiting to hear back a month ago
Joe Bordes validated this vulnerability a month ago
Raptor has been awarded the disclosure bounty
The fix bounty is now up for grabs
Joe Bordes confirmed that a fix has been merged on bcb740 a month ago
Joe Bordes has been awarded the fix bounty
Font.php#L1-L161 has been validated