CVE-2021-4140
Mozilla: Iframe sandbox bypass with XSLT
Severity Score
10.0
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
It was possible to construct specific XSLT markup that would be able to bypass an iframe sandbox. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.
Fue posible construir un marcado XSLT específico que podría omitir un entorno limitado de iframe. Esta vulnerabilidad afecta a Firefox ESR < 91.5, Firefox < 96 y Thunderbird < 91.5.
The Mozilla Foundation Security Advisory describes this flaw as:
It was possible to construct specific XSLT markups that would enable someone to bypass an iframe sandbox.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-12-20 CVE Reserved
- 2022-01-13 CVE Published
- 2024-08-03 CVE Updated
- 2024-08-03 First Exploit
- 2024-08-12 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-91: XML Injection (aka Blind XPath Injection)
- CWE-1021: Improper Restriction of Rendered UI Layers or Frames
CAPEC
References (6)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1746720 | 2024-08-03 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://www.mozilla.org/security/advisories/mfsa2022-01 | 2023-01-03 | |
| https://www.mozilla.org/security/advisories/mfsa2022-02 | 2023-01-03 | |
| https://www.mozilla.org/security/advisories/mfsa2022-03 | 2023-01-03 | |
| https://access.redhat.com/security/cve/CVE-2021-4140 | 2022-01-12 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2039568 | 2022-01-12 |
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" | < 96.0 Search vendor "Mozilla" for product "Firefox" and version " < 96.0" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | < 91.5 Search vendor "Mozilla" for product "Firefox Esr" and version " < 91.5" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | < 91.5 Search vendor "Mozilla" for product "Thunderbird" and version " < 91.5" | - |
Affected
| ||||||