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TI-2026-23408 Aliases CVE-2026-29964GHSA-pjr6-wxmx-75cg

HSC MailInspector v5.3.3-7 contains a Cross-Site Scripting (XSS) vulnerability in the…

Priority LOW 27CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00244 15th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:hsclabs:mailinspector:5.3.3-7:*:*:*:*:*:*:*5.3.3-7VulnerableHsclabs
  • cpe:2.3:a:hsclabs:mailinspector:5.3.3-7:*:*:*:*:*:*:* Versions 5.3.3-7 Vulnerable ·Hsclabs

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-29964
  2. 2026-10-03 Alias added: GHSA-pjr6-wxmx-75cg

References

Advisory 2

Other 1

  • TI-2024-22800 An issue was discovered in HSC Mailinspector 5.2.17-3 through v.5.2.18. CVSS 3.1HIGH 8.6
  • TI-2024-22802 An issue was discovered in HSC Mailinspector 5.2.17-3 through v.5.2.18. CVSS 3.1MEDIUM 5.5
  • TI-2024-22801 An issue was discovered in HSC Mailinspector 5.2.17-3. CVSS 3.1MEDIUM 5.4
  • TI-2024-21304 SQL Injection vulnerability in HSC Cybersecurity HC Mailinspector 5.2.17-3 through 5.2.18… CVSS 3.1MEDIUM 4.3
  • TI-2024-21305 An issue in HSC Cybersecurity HC Mailinspector 5.2.17-3 through 5.2.18 allows a remote… CVSS 3.1CRITICAL 9.8
  • TI-2026-23407 HSC MailInspector 5.3.3-7 has a Path Traversal vulnerability due to improper validation… CVSS 3.1HIGH 7.5
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences