GestSup versions before 3.2.62 contain a stored cross-site scripting vulnerability in the IMAP OAuth connector that double-decodes MIME-encoded… (CVE-2026-102374)
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.
AI Analysis
Technical Summary
The vulnerability in GestSup before version 3.2.62 is a stored XSS issue located in the IMAP OAuth connector component. It occurs because the system double-decodes MIME-encoded email subjects after applying HTML escaping, which enables attackers to craft nested MIME encoded-words that inject JavaScript code. When technicians view tickets generated from these emails, the injected script runs in their browser context. The CVSS 3.1 score is 6.1, indicating a medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impact on confidentiality and integrity but not availability.
Potential Impact
An unauthenticated attacker can send specially crafted emails to mailboxes monitored by GestSup. When a technician views the resulting ticket, the injected JavaScript executes in their session, potentially leading to data disclosure or manipulation within the technician's context. There is no indication of availability impact or known exploitation in the wild at this time.
Mitigation Recommendations
A fix is available in GestSup version 3.2.62. Users should upgrade to version 3.2.62 or later to remediate this vulnerability. No other mitigation guidance is provided or necessary as the vulnerability is addressed by the official patch.
GestSup versions before 3.2.62 contain a stored cross-site scripting vulnerability in the IMAP OAuth connector that double-decodes MIME-encoded… (CVE-2026-102374)
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.
CVSS v3.1
Score 6.1medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in GestSup before version 3.2.62 is a stored XSS issue located in the IMAP OAuth connector component. It occurs because the system double-decodes MIME-encoded email subjects after applying HTML escaping, which enables attackers to craft nested MIME encoded-words that inject JavaScript code. When technicians view tickets generated from these emails, the injected script runs in their browser context. The CVSS 3.1 score is 6.1, indicating a medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impact on confidentiality and integrity but not availability.
Potential Impact
An unauthenticated attacker can send specially crafted emails to mailboxes monitored by GestSup. When a technician views the resulting ticket, the injected JavaScript executes in their session, potentially leading to data disclosure or manipulation within the technician's context. There is no indication of availability impact or known exploitation in the wild at this time.
Mitigation Recommendations
A fix is available in GestSup version 3.2.62. Users should upgrade to version 3.2.62 or later to remediate this vulnerability. No other mitigation guidance is provided or necessary as the vulnerability is addressed by the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-rhv9-26qc-872f
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-102374"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6abb4176f7a7c54106cc2cbb
Added to database: 09/29/2026, 04:41:26 UTC
Last enriched: 09/29/2026, 04:42:56 UTC
Last updated: 09/29/2026, 18:11:16 UTC
Views: 3
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