CVE-2026-29964

EUVD-2026-30784
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 10%
Affected Products (NVD)
VendorProductVersion
hsclabsmailinspector
5.3.3-7
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/sql3t0/cve-disclosures
https://github.com/sql3t0/cve-disclosures/blob/main/03_-_CVE-2026-29964_XSS.md
https://hsclabs.com/pt-br/mailinspector/