CVE-2025-8029
published 2025-07-22CVE-2025-8029: Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR…
PriorityP337high8.1CVSS 3.1
AVNACLPRNUIRSUCHIHAN
EPSS
0.31%
22.6th percentile
Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 141.0-1 (sid) | firefox 141.0-1 (sid) |
| debian | firefox-esr | < firefox 141.0-1 (sid) | firefox 141.0-1 (sid) |
| debian | thunderbird | < firefox 141.0-1 (sid) | firefox 141.0-1 (sid) |
| mozilla | firefox | < 128.13.0 | 128.13.0 |
| mozilla | firefox | < 141.0 | 141.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 140.0 < 140.1.0 | 140.1.0 |
| mozilla | thunderbird | < 128.13.0 | 128.13.0 |
| mozilla | thunderbird | < 141.0 | 141.0 |
| mozilla | thunderbird | >= 0 < 1:128.13.0esr-1~deb11u1 | 1:128.13.0esr-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:128.13.0esr-1~deb12u1 | 1:128.13.0esr-1~deb12u1 |
| mozilla | thunderbird | >= 0 < 1:128.13.0esr-1 | 1:128.13.0esr-1 |
| mozilla | thunderbird | >= 0 < 1:128.13.0esr-1 | 1:128.13.0esr-1 |
| mozilla | thunderbird | >= 140.0 < 140.1.0 | 140.1.0 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
osv8.1HIGH
vendor_debian8.1HIGH
vendor_redhat8.1HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2026-02-02
CVE-2025-8031 Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, bypass security restrictions, cross-site
tracing, or execute arbitrary code.
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
firefox: thunderbird: javascript: URLs executed on object and embed tags
vendor_redhat·2025-07-22·CVSS 8.1
CVE-2025-8029 [HIGH] CWE-80 firefox: thunderbird: javascript: URLs executed on object and embed tags
firefox: thunderbird: javascript: URLs executed on object and embed tags
Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags. This vulnerability affects Firefox javascript: URLs when used in object and embed tags.
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: thunderbird (Red Hat Enterprise Linux 6) - Out of support scope
Package: thunderbird (Red Hat Enterprise Linux 7) - Out of support scope
Debian
CVE-2025-8029: firefox - Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags. ...
vendor_debian·2025·CVSS 8.1
CVE-2025-8029 [HIGH] CVE-2025-8029: firefox - Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags. ...
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.
Scope: local
sid: resolved (fixed in 141.0-1)
Mozilla
Mozilla Foundation Security Advisory 2025-63: CVE-2025-8029
vendor_mozilla·CVSS 8.1
CVE-2025-8029 [HIGH] Mozilla Foundation Security Advisory 2025-63: CVE-2025-8029
Mozilla Foundation Security Advisory 2025-63
CVE: CVE-2025-8029
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.1
Mozilla
Mozilla Foundation Security Advisory 2025-56: CVE-2025-8029
vendor_mozilla·CVSS 8.1
CVE-2025-8029 [HIGH] Mozilla Foundation Security Advisory 2025-56: CVE-2025-8029
Mozilla Foundation Security Advisory 2025-56
CVE: CVE-2025-8029
Product: Firefox
Impact: high
Fixed in: Firefox 141
Mozilla
Mozilla Foundation Security Advisory 2025-61: CVE-2025-8029
vendor_mozilla·CVSS 8.1
CVE-2025-8029 [HIGH] Mozilla Foundation Security Advisory 2025-61: CVE-2025-8029
Mozilla Foundation Security Advisory 2025-61
CVE: CVE-2025-8029
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 141
Mozilla
Mozilla Foundation Security Advisory 2025-58: CVE-2025-8029
vendor_mozilla·CVSS 8.1
CVE-2025-8029 [HIGH] Mozilla Foundation Security Advisory 2025-58: CVE-2025-8029
Mozilla Foundation Security Advisory 2025-58
CVE: CVE-2025-8029
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 128.13
Mozilla
Mozilla Foundation Security Advisory 2025-59: CVE-2025-8029
vendor_mozilla·CVSS 8.1
CVE-2025-8029 [HIGH] Mozilla Foundation Security Advisory 2025-59: CVE-2025-8029
Mozilla Foundation Security Advisory 2025-59
CVE: CVE-2025-8029
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.1
Mozilla
Mozilla Foundation Security Advisory 2025-62: CVE-2025-8029
vendor_mozilla·CVSS 8.1
CVE-2025-8029 [HIGH] Mozilla Foundation Security Advisory 2025-62: CVE-2025-8029
Mozilla Foundation Security Advisory 2025-62
CVE: CVE-2025-8029
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 128.13
OSV
CVE-2025-8029: Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags
osv·2025-07-22·CVSS 8.1
CVE-2025-8029 [HIGH] CVE-2025-8029: Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags
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.
GHSA
GHSA-657p-g22x-9v25: Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags
ghsa_unreviewed·2025-07-22
CVE-2025-8029 [HIGH] CWE-80 GHSA-657p-g22x-9v25: Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags
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.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1928021https://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/https://lists.debian.org/debian-lts-announce/2025/07/msg00016.html
2025-07-22
Published