CVE-2026-102374 Details
Description
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.
A stored cross-site scripting vulnerability has been identified in GestSup versions prior to 3.2.62. This issue resides within the IMAP OAuth connector, which processes email subjects in a way that can be exploited by unauthenticated attackers. The vulnerability arises because the connector double-decodes MIME-encoded subjects after applying HTML escaping, allowing for the injection of JavaScript. Exploitation occurs when crafted emails are sent to monitored mailboxes, with the injected script executing in the context of technician sessions upon ticket viewing.
Users are advised to update to GestSup version 3.2.62 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 29, 2026CISA-ADP
Assessed Sep 29, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| GestSup | < 3.2.62 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 30, 2026 | CVE Modified | [email protected] |
| Sep 29, 2026 | CVE Modified | CISA-ADP |
| Sep 29, 2026 | New CVE Received | [email protected] |