CVE-2021-43542
- Source
- https://cve.org/CVERecord?id=CVE-2021-43542
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43542.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-43542
- Downstream
- Related
- Published
- 2021-12-08T22:15:09.890Z
- Modified
- 2026-03-15T22:42:12.400248Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS Calculator
- Summary
- [none]
- Details
-
Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
- References
-
- https://www.mozilla.org/security/advisories/mfsa2021-54/
- https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
- https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
- https://security.gentoo.org/glsa/202202-03
- https://security.gentoo.org/glsa/202208-14
- https://www.debian.org/security/2021/dsa-5026
- https://www.mozilla.org/security/advisories/mfsa2021-53/
- https://www.debian.org/security/2022/dsa-5034
- https://www.mozilla.org/security/advisories/mfsa2021-52/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1723281
Affected packages
Git /
Database specific
unresolved_ranges
[
{
"events": [
{
"introduced": "0"
},
{
"fixed": "95.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "91.4.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "91.4.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "9.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "10.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "11.0"
}
]
}
]
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43542.json"