CVE-2026-29964 — MEDIUM (6.1)

Vulnerability 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.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Hsclabs	Mailinspector	5.3.3-7

Related Weaknesses (CWE)

CWE-79

References

https://github.com/sql3t0/cve-disclosuresThird Party Advisory
https://github.com/sql3t0/cve-disclosures/blob/main/03_-_CVE-2026-29964_XSS.mdThird Party Advisory
https://hsclabs.com/pt-br/mailinspector/Product

FAQ

What is CVE-2026-29964?

CVE-2026-29964 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 JavaSc...

How severe is CVE-2026-29964?

CVE-2026-29964 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-29964?

Check the references section above for vendor advisories and patch information. Affected products include: Hsclabs Mailinspector.