CVE-2019-11720: mozilla firefox
Vulnerability summary
CVE-2019-11720 is a medium (CVSS 6.1) vulnerability in mozilla firefox. EPSS estimates a 1.08% chance of exploitation in the next 30 days, higher than 65.3% of scored vulnerabilities.
Not severe (CVSS 6.1, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 13 · Related 11Timeline
- 23-07-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Some unicode characters are incorrectly treated as whitespace during the parsing of web content instead of triggering parsing errors. This allows malicious code to then be processed, evading cross-site scripting (XSS) filtering. This vulnerability affects Firefox < 68.
CVSS metrics
4 scores · 2 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
1.08%
Chance of exploitation in the next 30 days
Percentile
65%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.08% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu3 products
- firefox< 68.0+build3-0ubuntu0.16.04.1 | < 68.0+build3-0ubuntu0.18.04.1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
Mozilla1 product
- firefox≥ unspecified, < 68 | < 68.0
Opensuse1 product
- leapEOL15.0 | 15.1
3 vendors · 5 products
References
11 links- bugzilla.mozilla.org/show_bug.cgi?id=1556230X Refsource MISCIssue TrackingPermissions RequiredVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory