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().

Published: 2018-07-02 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-0499 is rated Moderate Risk (49.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.45%). EPSS rose +1.06% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-0499

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.39% 1.45% +1.06%
2 2025-03-30 0.99% 0.39% -0.59%
3 2025-03-29 — 0.99% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-0499

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2018-0499

GitHub Security Advisory for CVE-2018-0499

GHSA-7qw4-w7hf-22q3 · Severity: medium · Ecosystem: rubygems — xapian-core Cross-site Scripting vulnerability

OS Trackers for CVE-2018-0499

vendor priority summary link
alpine medium CVE-2018-0499: 1 source package rows (xapian-core); 8 state rows across 8 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-main, edge-community, edge-main); fixed 8, open 0. https://security.alpinelinux.org/vuln/CVE-2018-0499
debian not yet assigned CVE-2018-0499 not yet assigned priority: Debian including 1 source packages (xapian-core), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-0499
redhat medium — https://access.redhat.com/security/cve/CVE-2018-0499
suse high CVE-2018-0499 severity important: SUSE including 15 source package names (libxapian-devel, libxapian-devel-1.4.18-1.6, …), 37 product×package rows across 10 product lines (SUSE Linux Enterprise Module for Package Hub 15 SP5, SUSE Linux Enterprise Module for Package Hub 15 SP6, … (10 product lines)): Known Not Affected 29, Fixed 8. https://www.suse.com/security/cve/CVE-2018-0499/
ubuntu medium CVE-2018-0499 medium priority: Ubuntu including 1 source packages (xapian-core), 5 status rows across 5 suites (artful, bionic, trusty, upstream, xenial): released 3, not-affected 2. https://ubuntu.com/security/CVE-2018-0499

Affected software / configurations for CVE-2018-0499

Vendor Product Version Raw CPE
xapian xapian-core < 1.4.6 cpe:2.3:a:xapian:xapian-core:*:*:*:*:*:*:*:*
canonical ubuntu_linux 17.10 cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

References for CVE-2018-0499

cvelogic Threat Intelligence