How severe is CVE-2026-23608?

CVE-2026-23608 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-23608 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23608?

CVE-2026-23608 affects Gfi Mailessentials. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23608?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-23608 have an EU (EUVD) identifier?

Yes. CVE-2026-23608 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7810.

When was CVE-2026-23608 published?

CVE-2026-23608 was published on 2026-02-19 and last updated on 2026-06-17.

CVE-2026-23608

CVE-2026-23608 is a medium-severity vulnerability in Gfi Mailessentials with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 5.1
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7810
Weakness: CWE-79
Affected product: Gfi Mailessentials
Published: 2026-02-19
Last modified: 2026-06-17

Description

GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Mail Monitoring rule creation endpoint. An authenticated user can supply HTML/JavaScript in the JSON \"name\" field to /MailEssentials/pages/MailSecurity/MailMonitoring.aspx/Save, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.

Frequently asked questions

What is CVE-2026-23608?: GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Mail Monitoring rule creation endpoint. An authenticated user can supply HTML/JavaScript in the JSON \"name\" field to /MailEssentials/pages/MailSecurity/MailMonitoring.aspx/Save, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.
How severe is CVE-2026-23608?: CVE-2026-23608 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-23608 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23608?: CVE-2026-23608 affects Gfi Mailessentials. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23608?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-23608 have an EU (EUVD) identifier?: Yes. CVE-2026-23608 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7810.
When was CVE-2026-23608 published?: CVE-2026-23608 was published on 2026-02-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gfi:mailessentials:*:*:*:*:*:*:*:*

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