CVE-2026-23604GFI MailEssentials AI < 22.4 Keyword Filtering Rule Stored XSS
Updated under an hour ago ()
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It affects GFI Software MailEssentials AI and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Keyword Filtering rule creation workflow. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXB_RuleName parameter to /MailEssentials/pages/MailSecurity/contentchecking.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.
- CVSS
- 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- 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
- Analyzed
- Record last updated
- May 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
GFI Software MailEssentials AI gfi_software:mailessentials_ai (from the name) | before 22.4 | CNA record |
gfi mailessentials gfi:mailessentials | before 22.4 | NVD |
References
- https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releasesrelease-notes, patch
- https://www.vulncheck.com/advisories/gfi-mailessentials-ai-keyword-filtering-rule-stored-xssthird-party-advisory
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.