CVE-2026-100389GestSup before 3.2.62 Remote Code Execution via IMAP Attachment
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-434
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
GestSup GestSup gestsup:gestsup (from the name) | before 3.2.62 | CNA record |
References
- https://gestsup.fr/index.php?page=changelogrelease-notes
- https://gestsup.fr/index.php?page=downloadproduct
- https://www.vulncheck.com/advisories/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-description, exploit
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.