CVE-2026-29964

Published May 18, 2026 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:hsclabs:mailinspector:5.3.3-7:*:*:*:*:*:*:*
Type Values Removed Values Added
Title Unvalidated Reflected XSS in HSC MailInspector /tap/tap.php
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'}

Type Values Removed Values Added
First Time appeared Hsclabs
Hsclabs mailinspector
Vendors & Products Hsclabs
Hsclabs mailinspector
Type Values Removed Values Added
Title Unvalidated Reflected XSS in HSC MailInspector /tap/tap.php
Weaknesses CWE-79
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
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
May 18, 2026, 9:28 PM
Reserved
Mar 4, 2026, 12:00 AM
Status
Analyzed
Published
May 18, 2026, 6:17 PM
Modified
Oct 19, 2026, 10:10 PM