XSS in Hsclabs Mailinspector
CVE-2026-29965
HSC MailInspector 5.3.3-7 is vulnerable to Cross Site Scripting (XSS) in the /police/WarningUrlPage.php endpoint due to improper neutralization of user-supplied input that uses alternate or obfuscated JavaScript syntax.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (25.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Hsclabs Mailinspector — versions 5.3.3-7
Weakness classification (CWE)
References
- hsclabs.com/pt-br/mailinspector/ (Product)
- github.com/sql3t0/cve-disclosures (Third Party Advisory)
- github.com/sql3t0/cve-disclosures/blob/main/04_-_CVE-2026-29965_XSS.md (Third Party Advisory)
Frequently asked questions
- What is CVE-2026-29965?
- CVE-2026-29965 is a medium-severity vulnerability in Hsclabs Mailinspector, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-18.
- How severe is CVE-2026-29965?
- Medium severity. CVSS v3 base score is 6.1 out of 10.