What is CVE-2016-4460?

CVE-2016-4460 is a critical-severity vulnerability in Apache Pony Mail, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-08-22.

How severe is CVE-2016-4460?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Apache Pony Mail

CVE-2016-4460

Apache Pony Mail 0.6c through 0.8b allows remote attackers to bypass authentication.

Vulnerability class: Broken Authentication

Published 2017-08-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.061 (93.4th percentile), scored 2026-10-22.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.061 · newest: 0.061 · change: 0.000

Affected products

Apache Pony Mail — versions 0.6c, 0.7b, 0.8b

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.securityfocus.com/bid/100449 (VDB Entry, Third Party Advisory, vdb-entry)
markmail.org/message/jy7o23cppny26icu (Patch, Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2016-4460?: CVE-2016-4460 is a critical-severity vulnerability in Apache Pony Mail, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-08-22.
How severe is CVE-2016-4460?: Critical severity. CVSS v3 base score is 9.8 out of 10.