Security readout for executives and security teams
Plain-English summary
GFI MailEssentials AI before 22.4 can store attacker-supplied script in an anti-spam configuration page. A logged-in user who can change that setting could cause script to run later in another logged-in user's browser, potentially exposing session context or enabling unauthorized interface actions.
Executive priority
Treat this as a moderate-priority administrative interface risk. It is not shown as actively exploited, but it can affect privileged browser sessions and should be remediated during the next patch window.
Technical view
This is stored XSS in /MailEssentials/pages/MailSecurity/ipdnsblocklist.aspx via the ctl00$ContentPlaceHolder1$pv1$TXB_IPs parameter. The CVSS 3.1 score is 5.4: network reachable, low complexity, low privileges required, user interaction required, scope changed, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure is limited to organizations running GFI MailEssentials AI versions prior to 22.4 where authenticated users can access the IP DNS Blocklist configuration page. The sources do not establish internet-facing exposure or unauthenticated reachability.
Exploitation context
The CVE is not listed as KEV, and the supplied sources do not state active exploitation. Abuse requires an authenticated user and later rendering by a logged-in user in the management interface.
Researcher notes
Version evidence points to MailEssentials AI before 22.4, though the structured affected metadata is sparse. Validate exposure by product version and access control, not by unauthenticated scanning assumptions. Focus review on stored content rendering in the IP DNS Blocklist management workflow.
Mitigation direction
- Upgrade GFI MailEssentials AI to 22.4 or a vendor-supported fixed release.
- Review GFI release notes and vendor guidance for patch details.
- Restrict management interface access to trusted administrative users.
- Review stored IP DNS Blocklist entries for unexpected HTML or script-like content.
Validation and detection
- Confirm the installed MailEssentials AI version is 22.4 or later.
- Identify users who can modify the IP DNS Blocklist configuration page.
- Review recent changes to the IP DNS Blocklist configuration.
- Check administrative audit records for suspicious configuration activity.
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-2026-23612 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-ip-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.