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CVE-2020-26967

Date: December 8, 2020

When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code. This vulnerability affects Firefox < 83.

Severity Score

Related Resources (6)

https://www.mozilla.org/security/advisories/mfsa2020-50/
https://nvd.nist.gov/vuln/detail/CVE-2020-26967
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-26967
https://security.alpinelinux.org/vuln/CVE-2020-26967
https://bugzilla.mozilla.org/show_bug.cgi?id=1665820
https://www.mend.io/vulnerability-database/CVE-2020-26967

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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