CVE-2026-3610 Details
Description
A vulnerability was found in HSC Cybersecurity Mailinspector up to 5.3.2-3. Affected by this issue is some unknown functionality of the file /mailinspector/mliUserValidation.php of the component URL Handler. The manipulation of the argument error_description results in cross site scripting. The attack may be performed from remote. The exploit has been made public and could be used. Upgrading to version 5.4.0 can resolve this issue. You should upgrade the affected component. The vendor was contacted early and responded very professional: "We have already implemented the fix and made a hotfix available to affected customers, ensuring mitigation while the official release 5.4.0 has not yet been published. This allows customers to address the issue immediately, outside the regular release cycle."
A reflected cross-site scripting vulnerability has been identified in HSC Cybersecurity Mailinspector versions through 5.3.2-3. The issue resides in the URL Handler component, specifically within the file '/mailinspector/mliUserValidation.php'. The vulnerability is triggered by manipulating the 'error_description' parameter, which is not properly sanitized before being reflected in the page source. This allows remote, unauthenticated attackers to inject arbitrary JavaScript that executes in the context of the victim's browser. The exploitation could lead to session hijacking, unauthorized actions on behalf of the user, or malicious redirection.
Users are advised to upgrade to HSC Cybersecurity Mailinspector version 5.4.0, which addresses this vulnerability. A hotfix is also available for affected customers.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Mar 6, 2026CISA-ADP
Assessed Mar 9, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://docs.google.com/document/d/1KI2SIDcVm5U3Yzo5tNT5YOwREQWe_5BJaWe-ctRmLoI/edit?usp=sharing | [email protected] | Permission Required |
| https://vuldb.com/?ctiid.349219 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/?id.349219 | [email protected] | AdvisoryExploitRemedy |
| https://vuldb.com/?submit.748710 | [email protected] | Technical Description |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| HSC Cybersecurity Mailinspector | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Mar 6, 2026 | New CVE Received | [email protected] |