4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
5.1 Medium
AI Score
Confidence
Low
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
0.005 Low
EPSS
Percentile
77.2%
As specified in the W3C Content Security Policy draft, when creating a violation report, โUser agents need to ensure that the source file is the URL requested by the page, pre-redirects. If thatโs not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage.โ Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destinationโs origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Vendor | Product | Version | CPE |
---|---|---|---|
mozilla | firefox | * | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
mozilla | thunderbird | * | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |
mozilla | firefox_esr | * | cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* |
bugzilla.mozilla.org/show_bug.cgi?id=1542194
lists.debian.org/debian-lts-announce/2021/03/msg00000.html
security.gentoo.org/glsa/202104-09
security.gentoo.org/glsa/202104-10
www.debian.org/security/2021/dsa-4866
www.mozilla.org/security/advisories/mfsa2021-07/
www.mozilla.org/security/advisories/mfsa2021-08/
www.mozilla.org/security/advisories/mfsa2021-09/
More
4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
5.1 Medium
AI Score
Confidence
Low
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
0.005 Low
EPSS
Percentile
77.2%