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8.1
CVSSv3

CVE-2021-23976

Published: 26/02/2021 Updated: 27/05/2022
CVSS v2 Base Score: 5.8 | Impact Score: 4.9 | Exploitability Score: 8.6
CVSS v3 Base Score: 8.1 | Impact Score: 5.2 | Exploitability Score: 2.8
VMScore: 516
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N
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Vulnerability Summary

When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins. This could be used to gain fullscreen access for UI spoofing and could also lead to cross-origin attacks on targeted websites. Note: This issue is a different issue from CVE-2020-26954 and only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 86.

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Vendor Advisories

Mozilla: Security Vulnerabilities fixed in Firefox 86
Mozilla Foundation Security Advisory 2021-07 Security Vulnerabilities fixed in Firefox 86 Announced February 23, 2021 Impact high Products Firefox Fixed in Firefox 86 ...
Arch Linux Issues:
A security issue was found in Firefox for Android before version 860 When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins This could be used to gain fullscreen access for UI spoofing and could also lead to cross-origi ...

References

CWE-1021https://bugzilla.mozilla.org/show_bug.cgi?id=1684627https://www.mozilla.org/security/advisories/mfsa2021-07/https://security.gentoo.org/glsa/202104-10https://nvd.nist.govhttps://www.mozilla.org/en-US/security/advisories/mfsa2021-07/https://security.archlinux.org/CVE-2021-23976
CVSSv3
CVSSv2
CVSSv3
VMScore
Recommendations:
NULL pointer dereferenceCVE-2023-52689CVE-2024-23803client sideCVE-2023-52696information disclosureCVE-2024-35843CVE-2024-27130CVE-2023-52697
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