What is CVE-2017-10807?

CVE-2017-10807 is a critical-severity vulnerability in Jabberd2, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-07-04.

How severe is CVE-2017-10807?

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

Auth bypass in Jabberd2

CVE-2017-10807

JabberD 2.x (aka jabberd2) before 2.6.1 allows anyone to authenticate using SASL ANONYMOUS, even when the sasl.anonymous c2s.xml option is not enabled.

Vulnerability class: Broken Authentication

Published 2017-07-04 · 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: 0.028 (86.1th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.029 · newest: 0.028 · change: -0.001

Affected products

Jabberd2

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/jabberd2/jabberd2/commit/8416ae54ecefa670534f27a31db71d048b9c7f16 (Third Party Advisory)
www.debian.org/security/2017/dsa-3902 (vendor-advisory)
github.com/jabberd2/jabberd2/releases/tag/jabberd-2.6.1 (Third Party Advisory)
www.securityfocus.com/bid/99511 (VDB Entry, Third Party Advisory, vdb-entry)
bugs.debian.org/867032 (Third Party Advisory)

Frequently asked questions

What is CVE-2017-10807?: CVE-2017-10807 is a critical-severity vulnerability in Jabberd2, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-07-04.
How severe is CVE-2017-10807?: Critical severity. CVSS v3 base score is 9.8 out of 10.