Security readout for executives and security teams
Plain-English summary
GFI MailEssentials AI before 22.4 can store unsafe HTML or JavaScript in an anti-spam blocklist setting. When another logged-in user opens the management interface, the script may run in that user’s browser. This is a business concern mainly for admin-session compromise, configuration tampering, and phishing inside the management console.
Executive priority
Treat as a moderate-priority remediation item. It is not described as actively exploited, but it affects a security management product and could abuse trusted administrator sessions. Prioritize patching where the console is reachable by many users or shared admin accounts are used.
Technical view
This is a stored XSS issue in the URI DNS Blocklist configuration page for GFI MailEssentials AI before 22.4. The CVSS 3.1 score is 5.4: network reachable, low attack complexity, low privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure is most likely in organizations running GFI MailEssentials AI versions earlier than 22.4 with authenticated users able to modify anti-spam URI DNS blocklist settings. The provided affected-version metadata is sparse, so confirm deployed versions against vendor release notes.
Exploitation context
The bundle does not show CISA KEV listing or other evidence of active exploitation. Exploitation requires an authenticated user and a later management-interface view by a logged-in user. Impact depends on that viewer’s privileges and browser session context.
Researcher notes
Evidence supports stored XSS in a specific management page and parameter, but public affected-version metadata in the bundle is limited. Avoid assuming unauthenticated exposure or broader product impact. Focus validation on version confirmation, access control, and stored configuration content.
Mitigation direction
- Upgrade GFI MailEssentials AI to version 22.4 or later, per vendor release guidance.
- Restrict management-console access to trusted administrative users only.
- Review which accounts can edit anti-spam URI DNS blocklist settings.
- Monitor vendor guidance for any additional hardening or remediation instructions.
- Audit recent configuration changes for suspicious blocklist entries.
Validation and detection
- Inventory all GFI MailEssentials AI installations and record exact versions.
- Confirm no installation is running a version earlier than 22.4.
- Review URI DNS Blocklist entries for unexpected HTML or script-like content.
- Check management access logs for unusual authenticated configuration activity.
- Verify role assignments limit blocklist editing to appropriate administrators.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-23613 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N2.32.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
5.1MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releasesCVE reference, VulnCheck · release-notes, patch
- https://www.vulncheck.com/advisories/gfi-mailessentials-ai-anti-spam-uri-dns-blocklist-domain-stored-xssCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.