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.
Affected products
hsclabs: mailinspector
References3
- github.com/sql3t0/cve-disclosures Third Party Advisory
- github.com/sql3t0/cve-disclosures/blob/main/03_-_CVE-2026-29964… Third Party Advisory
- hsclabs.com/pt-br/mailinspector/ Product
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 16 · as of 14 November 2026
- CWE
- CWE-79
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