CVE-2026-100389
GestSup before 3.2.62 Remote Code Execution via IMAP Attachment
- State
- Published
- Severity
- 9.2 Critical
- Published
- Sep 25, 2026
- Updated
- Sep 30, 2026
- Reserved
- Sep 25, 2026
Description
GestSup versions before 3.2.62 contain a remote code execution vulnerability in the basic IMAP connector's attachment handling that fails to skip blocked file extensions. Unauthenticated attackers can send emails with PHP attachments to monitored mailboxes, which are written to the web-accessible upload/ticket directory and executed when accessed.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.2 Critical | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-434 Unrestricted Upload of File with Dangerous Type
Affected Products
| Product | Versions |
|---|---|
GestSupGestSup |
|
References
- https://gestsup.fr/index.php?page=changelogrelease-notes
- https://gestsup.fr/index.php?page=downloadproduct
- VulnCheck Advisory: GestSup before 3.2.61 Remote Code Execution via IMAP Attachmentthird-party-advisory
- https://blog.spiizn.xyz/articles/remote-code-execution-turning-a-ticket-into-a-new-issue/technical-descriptionexploit
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.