What is CVE-2017-9801?

CVE-2017-9801 is a high-severity vulnerability in Apache Commons Email, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-08-07.

How severe is CVE-2017-9801?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Apache Commons Email

CVE-2017-9801

When a call-site passes a subject for an email that contains line-breaks in Apache Commons Email 1.0 through 1.4, the caller can add arbitrary SMTP headers.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-08-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.060 (93.1th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.060 · newest: 0.060 · change: 0.000

Affected products

Apache Commons Email — versions 1.0, 1.1, 1.2
Apache Software Foundation Commons Email — versions 1.0 to 1.4

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

lists.apache.org/thread.html/7ef903a772a2ff08605df1be819044fb15df2815eb3d63878b… (mailing-list)
www.securitytracker.com/id/1039043 (VDB Entry, Third Party Advisory, vdb-entry)
www.securityfocus.com/bid/100082 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-9801?: CVE-2017-9801 is a high-severity vulnerability in Apache Commons Email, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-08-07.
How severe is CVE-2017-9801?: High severity. CVSS v3 base score is 7.5 out of 10.