DEBIAN-CVE-2019-11763

Advisory lineage Upstream: 1 Downstream: 4
Upstream
CVE-2019-11763
Published: 08 Jan 2020, 20:15
Last modified:28 Apr 2026, 20:20

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
6.1 MEDIUM
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

08 Jan 2020, 20:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:20
Last Modified
Vulnerability information updated

Description

Failure to correctly handle null bytes when processing HTML entities resulted in Firefox incorrectly parsing these entities. This could have led to HTML comment text being treated as HTML which could have led to XSS in a web application under certain conditions. It could have also led to HTML entities being masked from filters - enabling the use of entities to mask the actual characters of interest from filters. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected Systems

  • debian•firefox-esr

    < 68.2.0esr-1 | < 68.2.0esr-1 | < 68.2.0esr-1 | < 68.2.0esr-1

  • debian•thunderbird

    < 1:68.2.1-1 | < 1:68.2.1-1 | < 1:68.2.1-1 | < 1:68.2.1-1

References (1)