CVE-2022-29911

Mozilla: iframe Sandbox bypass

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

An improper implementation of the new iframe sandbox keyword <code>allow-top-navigation-by-user-activation</code> could lead to script execution without <code>allow-scripts</code> being present. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100.

Una implementación incorrecta de la nueva palabra clave de iframe sandbox <code>allow-top-navigation-by-user-activation</code> podría provocar la ejecución del script sin que <code>allow-scripts</code> esté presente. Esta vulnerabilidad afecta a Thunderbird < 91.9, Firefox ESR < 91.9 y Firefox < 100.

A flaw was found in Mozilla. The Mozilla Foundation Security Advisory describes the issue of Firefox not protecting against top-level navigations for an iframe sandbox with a policy relaxed through a keyword likely to allow top-navigation-by-user-activation.

An update that fixes 8 vulnerabilities is now available. This update for MozillaThunderbird fixes the following issues. Various security fixes MFSA 2022-18. Incorrect security status shown after viewing an attached email. Fullscreen notification bypass using popups. Bypassing permission prompt in nested browsing contexts. Leaking browser history with CSS variables. Iframe sandbox bypass. Reader mode bypassed SameSite cookies. Speech Synthesis feature not properly disabled. Memory safety bugs fixed in Thunderbird 91.9.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2022-04-29 CVE Reserved
2022-05-04 CVE Published
2025-04-16 CVE Updated
2025-08-16 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-1021: Improper Restriction of Rendered UI Layers or Frames

CAPEC

References (5)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.mozilla.org/security/advisories/mfsa2022-16	2023-01-04
https://www.mozilla.org/security/advisories/mfsa2022-17	2023-01-04
https://www.mozilla.org/security/advisories/mfsa2022-18	2023-01-04
https://access.redhat.com/security/cve/CVE-2022-29911	2022-05-18
https://bugzilla.redhat.com/show_bug.cgi?id=2081471	2022-05-18

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"				< 100.0 Search vendor "Mozilla" for product "Firefox" and version " < 100.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 91.9 Search vendor "Mozilla" for product "Firefox Esr" and version " < 91.9"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 91.9 Search vendor "Mozilla" for product "Thunderbird" and version " < 91.9"		-		Affected