GFI MailEssentials AI up to 22.3 IsDBExist ListServer.IsDBExist information exposure

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in GFI MailEssentials AI up to 22.3 and classified as problematic. This vulnerability affects the function ListServer.IsDBExist of the file /MailEssentials/pages/MailSecurity/ListServer.aspx/IsDBExist. Performing a manipulation results in information exposure. This vulnerability is known as CVE-2026-23620. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in GFI MailEssentials AI up to 22.3. It has been classified as problematic. This affects the function ListServer.IsDBExist of the file /MailEssentials/pages/MailSecurity/ListServer.aspx/IsDBExist. The manipulation with an unknown input leads to a information exposure vulnerability. CWE is classifying the issue as CWE-203. The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not. This is going to have an impact on confidentiality. The summary by CVE is:

GFI MailEssentials AI versions prior to 22.4 contain an arbitrary file existence enumeration vulnerability in the ListServer.IsDBExist() web method exposed at /MailEssentials/pages/MailSecurity/ListServer.aspx/IsDBExist. An authenticated user can supply an unrestricted filesystem path via the JSON key \"path\", which is URL-decoded and passed to File.Exists(), allowing the attacker to determine whether arbitrary files exist on the server.

The weakness was published by Alex Williams. The advisory is shared at gfi.ai. This vulnerability is uniquely identified as CVE-2026-23620 since 01/14/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 22.4 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Information exposure
CWE: CWE-203 / CWE-200 / CWE-284
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: MailEssentials AI 22.4

Timelineinfo

01/14/2026 CVE reserved
02/19/2026 +36 days Advisory disclosed
02/19/2026 +0 days VulDB entry created
02/19/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: gfi.ai
Researcher: Alex Williams
Status: Confirmed

CVE: CVE-2026-23620 (🔒)
GCVE (CVE): GCVE-0-2026-23620
GCVE (VulDB): GCVE-100-346965

Entryinfo

Created: 02/19/2026 21:46
Changes: 02/19/2026 21:46 (79)
Complete: 🔍
Cache ID: 216::103

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