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Vulnerability details: VCID-h6nu-7za9-aaag
Vulnerability ID VCID-h6nu-7za9-aaag
Aliases CVE-2019-11763
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-11763.html
rhas Critical https://access.redhat.com/errata/RHSA-2019:3193
rhas Critical https://access.redhat.com/errata/RHSA-2019:3196
rhas Critical https://access.redhat.com/errata/RHSA-2019:3281
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11763.json
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00168 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.00915 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
epss 0.01133 https://api.first.org/data/v1/epss?cve=CVE-2019-11763
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1764444
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11755
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11757
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11759
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11760
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11761
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11762
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11763
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11764
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15903
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2019-11763
cvssv3 6.1 https://nvd.nist.gov/vuln/detail/CVE-2019-11763
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2019-11763
archlinux Critical https://security.archlinux.org/AVG-1054
archlinux Critical https://security.archlinux.org/AVG-1055
generic_textual Low https://ubuntu.com/security/notices/USN-4165-1
generic_textual Medium https://ubuntu.com/security/notices/USN-4202-1
generic_textual Medium https://ubuntu.com/security/notices/USN-4335-1
generic_textual Low https://usn.ubuntu.com/usn/usn-4165-1
generic_textual Medium https://usn.ubuntu.com/usn/usn-4202-1
generic_textual Medium https://usn.ubuntu.com/usn/usn-4335-1
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-33
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-34
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2019-34/#CVE-2019-11763
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-35
generic_textual Medium https://www.mozilla.org/security/advisories/mfsa2019-34/
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-11763.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11763.json
https://api.first.org/data/v1/epss?cve=CVE-2019-11763
https://bugzilla.mozilla.org/show_bug.cgi?id=1584216
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11755
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11757
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11759
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11760
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11761
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11762
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11763
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11764
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15903
https://security.gentoo.org/glsa/202003-10
https://ubuntu.com/security/notices/USN-4165-1
https://ubuntu.com/security/notices/USN-4202-1
https://ubuntu.com/security/notices/USN-4335-1
https://usn.ubuntu.com/4335-1/
https://usn.ubuntu.com/usn/usn-4165-1
https://usn.ubuntu.com/usn/usn-4202-1
https://usn.ubuntu.com/usn/usn-4335-1
https://www.mozilla.org/en-US/security/advisories/mfsa2019-34/#CVE-2019-11763
https://www.mozilla.org/security/advisories/mfsa2019-33/
https://www.mozilla.org/security/advisories/mfsa2019-34/
https://www.mozilla.org/security/advisories/mfsa2019-35/
1764444 https://bugzilla.redhat.com/show_bug.cgi?id=1764444
ASA-201910-15 https://security.archlinux.org/ASA-201910-15
ASA-201910-16 https://security.archlinux.org/ASA-201910-16
AVG-1054 https://security.archlinux.org/AVG-1054
AVG-1055 https://security.archlinux.org/AVG-1055
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
CVE-2019-11763 https://nvd.nist.gov/vuln/detail/CVE-2019-11763
mfsa2019-33 https://www.mozilla.org/en-US/security/advisories/mfsa2019-33
mfsa2019-34 https://www.mozilla.org/en-US/security/advisories/mfsa2019-34
mfsa2019-35 https://www.mozilla.org/en-US/security/advisories/mfsa2019-35
RHSA-2019:3193 https://access.redhat.com/errata/RHSA-2019:3193
RHSA-2019:3196 https://access.redhat.com/errata/RHSA-2019:3196
RHSA-2019:3281 https://access.redhat.com/errata/RHSA-2019:3281
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11763.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-11763
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-11763
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-11763
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.51096
EPSS Score 0.00147
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.