Description
HSC MailInspector v5.3.3-7 contains a Cross-Site Scripting (XSS) vulnerability in the /tap/tap.php endpoint due to improper neutralization of user-controlled input using alternate or obfuscated JavaScript syntax. The endpoint reflects unsanitized user input in HTTP responses without adequate output encoding, allowing a remote attacker to execute arbitrary JavaScript code in the context of a victim's browser.
Published: 2026-05-18
Score: 6.1 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 19 May 2026 17:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:hsclabs:mailinspector:5.3.3-7:*:*:*:*:*:*:*

Tue, 19 May 2026 01:15:00 +0000

Type Values Removed Values Added
Title Unvalidated Reflected XSS in HSC MailInspector /tap/tap.php

Mon, 18 May 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 18 May 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Hsclabs
Hsclabs mailinspector
Vendors & Products Hsclabs
Hsclabs mailinspector

Mon, 18 May 2026 18:45:00 +0000

Type Values Removed Values Added
Title Unvalidated Reflected XSS in HSC MailInspector /tap/tap.php
Weaknesses CWE-79

Mon, 18 May 2026 17:45:00 +0000

Type Values Removed Values Added
Description HSC MailInspector v5.3.3-7 contains a Cross-Site Scripting (XSS) vulnerability in the /tap/tap.php endpoint due to improper neutralization of user-controlled input using alternate or obfuscated JavaScript syntax. The endpoint reflects unsanitized user input in HTTP responses without adequate output encoding, allowing a remote attacker to execute arbitrary JavaScript code in the context of a victim's browser.
References

Subscriptions

Hsclabs Mailinspector
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-18T21:28:51.998Z

Reserved: 2026-03-04T00:00:00.000Z

Link: CVE-2026-29964

cve-icon Vulnrichment

Updated: 2026-05-18T21:24:47.913Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-18T18:17:21.650

Modified: 2026-06-17T10:29:57.803

Link: CVE-2026-29964

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-19T01:00:12Z

Weaknesses