CVE-2018-11713

WebCore/platform/network/soup/SocketStreamHandleImplSoup.cpp in the libsoup network backend of WebKit, as used in WebKitGTK+ prior to version 2.20.0 or without libsoup 2.62.0, unexpectedly failed to use system proxy settings for WebSocket connections. As a result, users could be deanonymized by crafted web sites via a WebSocket connection.

Published: 2018-06-04 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-11713 is rated Moderate Risk (49.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.55%). 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-2018-11713

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 2026-01-14 0.41% 0.55% +0.14%
2 2025-11-21 0.24% 0.41% +0.17%
3 2025-11-18 — 0.24% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-11713

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 [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-2018-11713

OS Trackers for CVE-2018-11713

vendor priority summary link
debian unimportant CVE-2018-11713 unimportant priority: Debian including 1 source packages (webkit2gtk), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-11713
gentoo normal CVE-2018-11713: 1 GLSA(s) (201808-04), 1 atom(s) (net-libs/webkit-gtk); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-11713
redhat medium — https://access.redhat.com/security/cve/CVE-2018-11713
suse medium CVE-2018-11713 severity moderate: SUSE including 601 source package names (PackageKit-1.1.10-1.el7, PackageKit-command-not-found-1.1.10-1.el7, …), 867 product×package rows across 68 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 4.0, … (68 product lines)): Fixed 665, Known Not Affected 202. https://www.suse.com/security/cve/CVE-2018-11713/
ubuntu low CVE-2018-11713 low priority: Ubuntu including 5 source packages (qtwebkit, qtwebkit-opensource-src, qtwebkit-source, webkit2gtk, webkitgtk), 83 status rows across 17 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, trusty, upstream, xenial): DNE 38, ignored 28, not-affected 13, needs-triage 3, released 1. https://ubuntu.com/security/CVE-2018-11713

Affected software / configurations for CVE-2018-11713

Vendor Product Version Raw CPE
webkitgtk webkitgtk\+ < 2.20.0 cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:*
gnome libsoup < 2.62.0 cpe:2.3:a:gnome:libsoup:*:*:*:*:*:*:*:*

References for CVE-2018-11713

URL Tags
https://bugs.webkit.org/show_bug.cgi?id=126384 Issue Tracking Patch Third Party Advisory
https://security.gentoo.org/glsa/201808-04
https://trac.webkit.org/changeset/228088/webkit Issue Tracking Patch Third Party Advisory
cvelogic Threat Intelligence