GestSup versions before 3.2.62 contain a stored cross-site scripting vulnerability in the IMAP OAuth connector that double-decodes MIME-encoded email subjects after HTML escaping. Unauthenticated attackers can send crafted emails to monitored mailboxes with nested MIME encoded-words to inject JavaScript that executes in technician sessions when viewing tickets.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://gestsup.fr/index.php?page=changelog
disclosure@vulncheck.com
https://gestsup.fr/index.php?page=download
disclosure@vulncheck.com
https://gestsup.fr/index.php?page=download&channel=stable&version=3.2.62&type=p…
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/gestsup-before-3.2.62-stored-xss-via-doubl…
disclosure@vulncheck.com
https://blog.spiizn.xyz/articles/remote-code-execution-turning-a-ticket-into-a-…
disclosure@vulncheck.com