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TI-2026-65371 Aliases CVE-2026-102374GHSA-rhv9-26qc-872f

GestSup before 3.2.62 Stored XSS via Double-Decoded Email Subject in OAuth IMAP Connector

Priority LOW 23CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00211 11th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed GestSup (GestSup): 3.2.62

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GestSupGestSupbefore 3.2.623.2.62Patch availableCNA
  • GestSup VendorGestSup Affected before 3.2.62 Fixed in 3.2.62 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:gestsup:gestsup:*:*:*:*:*:*:*:*——GestSup
  • cpe:2.3:a:gestsup:gestsup:*:*:*:*:*:*:*:* Versions — — ·GestSup

Remediation

  • Fix · CNA GestSup (GestSup) Fixed in 3.2.62

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    GestSup 3.2.62

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-65370 GestSup before 3.2.62 Private Ticket Comment Disclosure via threadedit ParameterPriority MEDIUM 64
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-102374
  2. 2026-10-03 Alias added: GHSA-rhv9-26qc-872f

References

Exploit 1

Patch 1

Other 2

  • TI-2026-65370 GestSup before 3.2.62 Private Ticket Comment Disclosure via threadedit Parameter CVSS 4.0HIGH 7.1
  • TI-2023-28509 A cross-site scripting (XSS) vulnerability in Gestsup v3.2.46 allows attackers to execute… CVSS 3.1MEDIUM 5.4
  • TI-2023-28510 A Cross-Site Request Forgery (CSRF) in Gestsup v3.2.46 allows attackers to arbitrarily… CVSS 3.1MEDIUM 4.3
  • TI-2021-11728 Gestsup before 3.2.10 allows account takeover through the password recovery functionality… CVSS 3.1CRITICAL 9.8
  • TI-2026-64662 GestSup before 3.2.62 Remote Code Execution via IMAP Attachment CVSS 4.0CRITICAL 9.2
  • TI-2026-17804 GestSup <= 3.2.60 CSRF Allows Privileged Actions CVSS 4.0HIGH 8.9
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences