CVE-2026-29964CWE-79cross-site-scripting

CVE-2026-29964

Medium · published May 18, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
33.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00407 · 33.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-18T22:17Z
Affected products (1)
ProductVersionsFixed in
hsclabs/mailinspectorall versions—
References (3)
https://github.com/sql3t0/cve-disclosures · [email protected]https://github.com/sql3t0/cve-disclosures/blob/main/03_-_CVE-2026-29964_XSS.md · [email protected]https://hsclabs.com/pt-br/mailinspector/ · [email protected]
EPSS history
Timeline
  • 18 MAY 00:00Z
    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…
    cvelistv5