PT-2026-41707 · Hsc · Hc Mailinspector

Published 2026-05-18 · Updated 2026-05-18 · CVE-2026-29964

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions HSC MailInspector version 5.3.3-7

Description A Cross-Site Scripting (XSS) issue exists in the '/tap/tap.php' endpoint. This occurs because user-controlled input is not properly neutralized, even when alternate or obfuscated JavaScript syntax is used. The endpoint reflects unsanitized input in HTTP responses without adequate output encoding, which enables a remote attacker to execute arbitrary JavaScript code within the browser of a victim.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-29964

Affected Products

Hc Mailinspector

References · 6

• 🔥 https://github.com/sql3t0/cve-disclosures · Exploit
• 🔥 https://github.com/sql3t0/cve-disclosures/blob/main/03_-_CVE-2026-29964_XSS.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-29964 · Security Note
• https://t.me/cveNotify/163933 · Telegram Post
• https://t.me/CVEtracker/54147 · Telegram Post
• https://hsclabs.com/pt-br/mailinspector · Note