Debian Security Bug TrackerDEBIANCVE:CVE-2020-26956CVE-2020-26956
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
0.001 Low
EPSS
Percentile
41.6%
In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 999 | all | firefox | < 83.0-1 | firefox_83.0-1_all.deb |
| Debian | 12 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 11 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 999 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 13 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 12 | all | thunderbird | < 1:78.5.0-1 | thunderbird_1:78.5.0-1_all.deb |
| Debian | 11 | all | thunderbird | < 1:78.5.0-1 | thunderbird_1:78.5.0-1_all.deb |
| Debian | 999 | all | thunderbird | < 1:78.5.0-1 | thunderbird_1:78.5.0-1_all.deb |
| Debian | 13 | all | thunderbird | < 1:78.5.0-1 | thunderbird_1:78.5.0-1_all.deb |
Related
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
0.001 Low
EPSS
Percentile
41.6%