CVE-2026-29964 | THREATINT

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 Reserved 2026-03-04 | Published 2026-05-18 | Updated 2026-05-18 | Assigner mitre

References

hsclabs.com/pt-br/mailinspector/

github.com/sql3t0/cve-disclosures

github.com/...sclosures/blob/main/03_-_CVE-2026-29964_XSS.md

cve.org (CVE-2026-29964)

nvd.nist.gov (CVE-2026-29964)

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