CVE-2026-29964
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.
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.24% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- hsclabs/mailinspector
- Source
- cve@mitre.org
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.