CVE-2021-43544
When receiving a URL through a SEND intent, Firefox would have searched for the text, but...
When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have caused the URL to load unintentionally, which could lead to XSS and spoofing attacks. This bug only affects Firefox for Android. Other operating systems are unaffected.. This vulnerability affects Firefox < 95.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have caused the URL to load unintentionally, which could lead to XSS and spoofing attacks. This bug only affects Firefox for Android. Other operating systems are unaffected.. This vulnerability affects Firefox < 95.
- Record
CVE-2021-43544- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have caused the URL to load unintentionally, which could lead to XSS and spoofing attacks. This bug only affects Firefox for Android. Other operating systems are unaffected.. This vulnerability affects Firefox < 95.
- Record
CVE-2021-43544- Updated
- 2026-11-02
EUVDEUVD-2021-30473 No score
When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have caused the URL to load unintentionally, which could lead to XSS and spoofing attacks. This bug only affects Firefox for Android. Other operating systems are unaffected.. This vulnerability affects Firefox < 95.
- Record
EUVD-2021-30473- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7w2r-8gq9-28xx No score
When receiving a URL through a SEND intent, Firefox would have searched for the text, but...
When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have caused the URL to load unintentionally, which could lead to XSS and spoofing attacks. This bug only affects Firefox for Android. Other operating systems are unaffected.. This vulnerability affects Firefox < 95.
- Record
GHSA-7w2r-8gq9-28xx- Weakness
- CWE-79
- Updated
- 2026-11-02
OSVALPINE-CVE-2021-43544
When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have caused the URL to load unintentionally, which could lead to XSS and spoofing attacks. This bug only affects Firefox for Android. Other operating systems are unaffected.. This vulnerability affects Firefox < 95.
- Record
ALPINE-CVE-2021-43544- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-03
OSVopenSUSE-SU-2024:11669-1 No score
MozillaFirefox-95.0-1.1 on GA media
These are all security issues fixed in the MozillaFirefox-95.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:11669-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:14572-1 No score
firefox-esr-128.5.1-1.1 on GA media
These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:14572-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
firefoxAlpine:v3.16 |
before 95.0-r0 | 95.0-r0 |
firefoxAlpine:v3.17 |
before 95.0-r0 | 95.0-r0 |
firefoxAlpine:v3.18 |
before 95.0-r0 | 95.0-r0 |
firefoxAlpine:v3.19 |
before 95.0-r0 | 95.0-r0 |
firefoxAlpine:v3.20 |
before 95.0-r0 | 95.0-r0 |
firefoxAlpine:v3.21 |
before 95.0-r0 | 95.0-r0 |
firefoxAlpine:v3.22 |
before 95.0-r0 | 95.0-r0 |
firefoxAlpine:v3.23 |
before 95.0-r0 | 95.0-r0 |
librewolfAlpine:v3.21 |
before 95.0-r0 | 95.0-r0 |
librewolfAlpine:v3.22 |
before 95.0-r0 | 95.0-r0 |
Show 4 moreShow less
| Package | Affected | Fixed |
|---|---|---|
librewolfAlpine:v3.23 |
before 95.0-r0 | 95.0-r0 |
librewolfAlpine:v3.24 |
before 95.0-r0 | 95.0-r0 |
MozillaFirefoxopenSUSE:Tumbleweed From an advisory covering 11 CVEs |
before 95.0-1.1 | 95.0-1.1 |
firefox-esropenSUSE:Tumbleweed From an advisory covering 1860 CVEs |
before 128.5.1-1.1 | 128.5.1-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected, aliases, references | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-43544 is a medium vulnerability (CVSS 6.1) in Mozilla Firefox, published December 8, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 44th percentile. Fixed in firefox 95.0-r0.
References
mozilla.org/security/advisories/mfsa2021-52
bugzilla.mozilla.org/show_bug.cgi?id=1739934
nvd.nist.gov/vuln/detail/CVE-2021-43544
github.com/advisories/GHSA-7w2r-8gq9-28xx
security.alpinelinux.org/vuln/CVE-2021-43544
suse.com/security/cve/CVE-2021-43536
Show 194 moreShow less
lists.opensuse.org/archives/list/[email protected]/thread/3HI2RC7AJAHY74Q6MK7GNGWU6TITB22V
Left out here: 1,666 references. The JSON record has them.