CVE-2018-5143 — Cross-site Scripting in Mozilla Firefox

CWE-79 — Cross-site Scripting8 documents5 sources
Severity
6.1MEDIUMNVD
OSV8.8
EPSS
0.5%
top 35.51%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxDebian FirefoxCanonical Ubuntu Linux
Timeline
PublishedJun 11
Latest updateMay 14

Description

URLs using "javascript:" have the protocol removed when pasted into the addressbar to protect users from cross-site scripting (XSS) attacks, but if a tab character is embedded in the "javascript:" URL the protocol is not removed and the script will execute. This could allow users to be socially engineered to run an XSS attack against themselves. This vulnerability affects Firefox < 59.

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.7

Affected Packages4 packages

▶debiandebian/firefox< firefox 59.0-1 (sid)
▶CVEListV5mozilla/firefoxunspecified — 59
▶NVDmozilla/firefox< 59.0
▶Ubuntumozilla/firefox< 59.0+build5-0ubuntu0.14.04.1+4

Also affects: Ubuntu Linux 14.04, 16.04, 17.10

🔴Vulnerability Details

4
GHSA
GHSA-qqw6-4m7h-4hwr: URLs using "javascript:" have the protocol removed when pasted into the addressbar to protect users from cross-site scripting (XSS) attacks, but if a↗2022-05-14
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OSV
firefox regression↗2018-04-06
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OSV
firefox vulnerabilities↗2018-03-14
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OSV
CVE-2018-5143: URLs using "javascript:" have the protocol removed when pasted into the addressbar to protect users from cross-site scripting (XSS) attacks, but if a↗2018-03-14
▶

📋Vendor Advisories

3
Ubuntu
Firefox regression↗2018-04-06
▶
Ubuntu
Firefox vulnerabilities↗2018-03-14
▶
Debian
CVE-2018-5143: firefox - URLs using "javascript:" have the protocol removed when pasted into the addressb...↗2018
▶