CVE-2020-26956
Mozilla: XSS through paste (manual and clipboard API)
Severity Score
6.1
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
En algunos casos, al eliminar unos elementos HTML durante el saneamiento mantendría los actuales manejadores de eventos SVG y, por lo tanto, conllevaría a un ataque de tipo XSS. Esta vulnerabilidad afecta a Firefox versiones anteriores a 83, Firefox ESR versiones anteriores a 78.5, y Thunderbird versiones anteriores a 78.5
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2020-10-12 CVE Reserved
- 2020-11-18 CVE Published
- 2024-08-04 CVE Updated
- 2024-10-13 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC
References (5)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://www.mozilla.org/security/advisories/mfsa2020-50 | 2020-12-10 | |
| https://www.mozilla.org/security/advisories/mfsa2020-51 | 2020-12-10 | |
| https://www.mozilla.org/security/advisories/mfsa2020-52 | 2020-12-10 | |
| https://access.redhat.com/security/cve/CVE-2020-26956 | 2020-12-01 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1898734 | 2020-12-01 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Mozilla Search vendor "Mozilla" | Firefox Search vendor "Mozilla" for product "Firefox" | < 83.0 Search vendor "Mozilla" for product "Firefox" and version " < 83.0" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | < 78.5 Search vendor "Mozilla" for product "Firefox Esr" and version " < 78.5" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | < 78.5 Search vendor "Mozilla" for product "Thunderbird" and version " < 78.5" | - |
Affected
| ||||||