What is CVE-2018-0499?

CVE-2018-0499 is a medium-severity vulnerability in Xapian Xapian-Core, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-07-02.

How severe is CVE-2018-0499?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Xapian Xapian-Core

CVE-2018-0499

A cross-site scripting vulnerability in queryparser/termgenerator_internal.cc in Xapian xapian-core before 1.4.6 exists due to incomplete HTML escaping by Xapian::MSet::snippet().

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-07-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.6th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Xapian Xapian-Core
Canonical Ubuntu Linux — versions 17.10, 18.04
Xapian Xapian-Core Before 1.4.6 — versions Xapian xapian-core before 1.4.6

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

trac.xapian.org/wiki/SecurityFixes/2018-07-02 (Patch, Vendor Advisory)
usn.ubuntu.com/3709-1/ (vendor-advisory, Third Party Advisory)
lists.xapian.org/pipermail/xapian-discuss/2018-July/009652.html (Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2018-0499?: CVE-2018-0499 is a medium-severity vulnerability in Xapian Xapian-Core, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-07-02.
How severe is CVE-2018-0499?: Medium severity. CVSS v3 base score is 6.1 out of 10.