CVE-2021-23953 Information

Description

If a user clicked into a specifically crafted PDF the PDF reader could be confused into leaking cross-origin information when said information is served as chunked data. This vulnerability affects Firefox < 85 Thunderbird < 78.7 and Firefox ESR < 78.7.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Reference

https://www.mozilla.org/security/advisories/mfsa2021-04/ https://www.mozilla.org/security/advisories/mfsa2021-05/ https://www.mozilla.org/security/advisories/mfsa2021-03/ https://bugzilla.mozilla.org/show_bug.cgi?id=1683940

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

4.3