CVE-2016-5191

Bookmark handling in Google Chrome prior to 54.0.2840.59 for Windows, Mac, and Linux; 54.0.2840.85 for Android had insufficient validation of supplied data, which allowed a remote attacker to inject arbitrary scripts or HTML (UXSS) via crafted HTML pages, as demonstrated by an interpretation conflict between userinfo and scheme in an http://javascript:[email protected] URL.

Published: 2016-12-17 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-5191 is rated Moderate Risk (50.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.76%). 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-2016-5191

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 2026-06-19 1.74% 1.76% +0.02%
2 2026-06-15 0.39% 1.74% +1.35%
3 2025-03-17 — 0.39% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-5191

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-2016-5191

OS Trackers for CVE-2016-5191

vendor priority summary link
gentoo normal CVE-2016-5191: 1 GLSA(s) (201610-09), 1 atom(s) (www-client/chromium); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-5191
redhat medium — https://access.redhat.com/security/cve/CVE-2016-5191
ubuntu medium CVE-2016-5191 medium priority: Ubuntu including 2 source packages (chromium-browser, oxide-qt), 12 status rows across 6 suites (precise, trusty, upstream, xenial, yakkety, zesty): released 5, not-affected 4, DNE 2, ignored 1. https://ubuntu.com/security/CVE-2016-5191

Affected software / configurations for CVE-2016-5191

Vendor Product Version Raw CPE
google chrome <= 53.0.2785.143 cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

References for CVE-2016-5191

cvelogic Threat Intelligence