CVE-2025-8029

firefox: thunderbird: javascript: URLs executed on object and embed tags

Severity Score

8.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags. This vulnerability affects Firefox < 141, Firefox ESR < 128.13, Firefox ESR < 140.1, Thunderbird < 141, Thunderbird < 128.13, and Thunderbird < 140.1.

Firefox executed `javascript:` URLs when used in `object` and `embed` tags. This vulnerability affects Firefox < 141, Firefox ESR < 128.13, Firefox ESR < 140.1, Thunderbird < 141, Thunderbird < 128.13, and Thunderbird < 140.1.

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Firefox executed <code>javascript:</code> URLs when used in <code>object</code> and <code>embed</code> tags.

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

*Credits: Mirko Brodesser

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

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

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2025-07-22 CVE Reserved
2025-07-22 CVE Published
2025-07-29 EPSS Updated
2025-07-31 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

CAPEC

References (9)

URL	Tag	Source
https://bugzilla.mozilla.org/show_bug.cgi?id=1928021
https://www.mozilla.org/security/advisories/mfsa2025-56
https://www.mozilla.org/security/advisories/mfsa2025-58
https://www.mozilla.org/security/advisories/mfsa2025-59
https://www.mozilla.org/security/advisories/mfsa2025-61
https://www.mozilla.org/security/advisories/mfsa2025-62
https://www.mozilla.org/security/advisories/mfsa2025-63

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2025-8029	2025-08-12
https://bugzilla.redhat.com/show_bug.cgi?id=2382720	2025-08-12

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"				*		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				*		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				*		-		Affected
Oracle Search vendor "Oracle"		Linux Search vendor "Oracle" for product "Linux"				*		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				*		-		Affected
Redhat Search vendor "Redhat"		Rhel Aus Search vendor "Redhat" for product "Rhel Aus"				*		-		Affected
Redhat Search vendor "Redhat"		Rhel E4s Search vendor "Redhat" for product "Rhel E4s"				*		-		Affected
Redhat Search vendor "Redhat"		Rhel Eus Search vendor "Redhat" for product "Rhel Eus"				*		-		Affected
Redhat Search vendor "Redhat"		Rhel Eus Long Life Search vendor "Redhat" for product "Rhel Eus Long Life"				*		-		Affected
Alma Search vendor "Alma"		Linux Search vendor "Alma" for product "Linux"				*		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				*		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				*		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				*		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				*		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				*		-		Affected
Oracle Search vendor "Oracle"		Linux Search vendor "Oracle" for product "Linux"				*		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				*		-		Affected
Redhat Search vendor "Redhat"		Rhel Aus Search vendor "Redhat" for product "Rhel Aus"				*		-		Affected
Redhat Search vendor "Redhat"		Rhel E4s Search vendor "Redhat" for product "Rhel E4s"				*		-		Affected
Redhat Search vendor "Redhat"		Rhel Els Search vendor "Redhat" for product "Rhel Els"				*		-		Affected
Redhat Search vendor "Redhat"		Rhel Eus Search vendor "Redhat" for product "Rhel Eus"				*		-		Affected
Slackware Search vendor "Slackware"		Slackware Linux Search vendor "Slackware" for product "Slackware Linux"				*		-		Affected
Suse Search vendor "Suse"		Packagehub Search vendor "Suse" for product "Packagehub"				*		-		Affected
Suse Search vendor "Suse"		Sle-module-desktop-applications Search vendor "Suse" for product "Sle-module-desktop-applications"				*		-		Affected
Suse Search vendor "Suse"		Sle-we Search vendor "Suse" for product "Sle-we"				*		-		Affected
Suse Search vendor "Suse"		Sle Hpc-espos Search vendor "Suse" for product "Sle Hpc-espos"				*		-		Affected
Suse Search vendor "Suse"		Sle Hpc-ltss Search vendor "Suse" for product "Sle Hpc-ltss"				*		-		Affected
Suse Search vendor "Suse"		Sle Hpc Search vendor "Suse" for product "Sle Hpc"				*		-		Affected
Suse Search vendor "Suse"		Sled Search vendor "Suse" for product "Sled"				*		-		Affected
Suse Search vendor "Suse"		Sles-ltss-extended-security Search vendor "Suse" for product "Sles-ltss-extended-security"				*		-		Affected
Suse Search vendor "Suse"		Sles-ltss Search vendor "Suse" for product "Sles-ltss"				*		-		Affected
Suse Search vendor "Suse"		Sles Search vendor "Suse" for product "Sles"				*		-		Affected
Suse Search vendor "Suse"		Sles Sap Search vendor "Suse" for product "Sles Sap"				*		-		Affected