CVE-2025-0240
published 2025-01-07CVE-2025-0240: Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability…
PriorityP416medium4CVSS 3.1
AVLACLPRNUINSUCNILAN
EPSS
0.66%
47.8th percentile
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 134.0-1 (sid) | firefox 134.0-1 (sid) |
| debian | firefox-esr | < firefox 134.0-1 (sid) | firefox 134.0-1 (sid) |
| debian | thunderbird | < firefox 134.0-1 (sid) | firefox 134.0-1 (sid) |
| mozilla | firefox | < 128.6.0 | 128.6.0 |
| mozilla | firefox | < 134.0 | 134.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 0 < 134.0+build1-0ubuntu0.20.04.1 | 134.0+build1-0ubuntu0.20.04.1 |
| mozilla | thunderbird | < 128.6.0 | 128.6.0 |
| mozilla | thunderbird | >= 0 < 1:128.6.0esr-1~deb11u1 | 1:128.6.0esr-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:128.6.0esr-1~deb12u1 | 1:128.6.0esr-1~deb12u1 |
| mozilla | thunderbird | >= 0 < 1:128.6.0esr-1 | 1:128.6.0esr-1 |
| mozilla | thunderbird | >= 0 < 1:128.6.0esr-1 | 1:128.6.0esr-1 |
| mozilla | thunderbird | >= 129.0 < 134.0 | 134.0 |
CVSS provenance
nvdv3.14.0MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
osv5.4MEDIUM
vendor_ubuntu5.4MEDIUM
vendor_debian4.0MEDIUM
vendor_redhat4.0MEDIUM
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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.
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2025-01-09·CVSS 5.4
CVE-2025-0240 [MEDIUM] Firefox vulnerabilities
Title: Firefox vulnerabilities
Summary: Several security issues were fixed in Firefox.
Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information across domains, or execute arbitrary code. (CVE-2025-0237,
CVE-2025-0239, CVE-2025-0240, CVE-2025-0242, CVE-2025-0243, CVE-2025-0247)
Irvan Kurniawan discovered that Firefox incorrectly handled memory when
breaking lines in text, leading to a use-after-free vulnerability. An
attacker could possibly use this issue to cause a denial of service or
possibly execute arbitrary code. (CVE-2025-0238)
Nils Bars discovered that Firefox incorrectly handled memory when using
JavaScript Text Segm
Red Hat
firefox: Compartment mismatch when parsing JavaScript JSON module
vendor_redhat·2025-01-07·CVSS 4.0
CVE-2025-0240 [MEDIUM] CWE-416 firefox: Compartment mismatch when parsing JavaScript JSON module
firefox: Compartment mismatch when parsing JavaScript JSON module
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free.
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: firefox-flatpak-container (Red Hat Enterprise L
Debian
CVE-2025-0240: firefox - Parsing a JavaScript module as JSON could, under some circumstances, cause cross...
vendor_debian·2025·CVSS 4.0
CVE-2025-0240 [MEDIUM] CVE-2025-0240: firefox - Parsing a JavaScript module as JSON could, under some circumstances, cause cross...
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.
Scope: local
sid: resolved (fixed in 134.0-1)
Mozilla
Mozilla Foundation Security Advisory 2025-04: CVE-2025-0240
vendor_mozilla·CVSS 4.0
CVE-2025-0240 [MEDIUM] Mozilla Foundation Security Advisory 2025-04: CVE-2025-0240
Mozilla Foundation Security Advisory 2025-04
CVE: CVE-2025-0240
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 134
Mozilla
Mozilla Foundation Security Advisory 2025-01: CVE-2025-0240
vendor_mozilla·CVSS 4.0
CVE-2025-0240 [MEDIUM] Mozilla Foundation Security Advisory 2025-01: CVE-2025-0240
Mozilla Foundation Security Advisory 2025-01
CVE: CVE-2025-0240
Product: Firefox
Impact: high
Fixed in: Firefox 134
Mozilla
Mozilla Foundation Security Advisory 2025-02: CVE-2025-0240
vendor_mozilla·CVSS 4.0
CVE-2025-0240 [MEDIUM] Mozilla Foundation Security Advisory 2025-02: CVE-2025-0240
Mozilla Foundation Security Advisory 2025-02
CVE: CVE-2025-0240
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 128.6
Mozilla
Mozilla Foundation Security Advisory 2025-05: CVE-2025-0240
vendor_mozilla·CVSS 4.0
CVE-2025-0240 [MEDIUM] Mozilla Foundation Security Advisory 2025-05: CVE-2025-0240
Mozilla Foundation Security Advisory 2025-05
CVE: CVE-2025-0240
Product: Thunderbird
Impact: moderate
Fixed in: Thunderbird 128.6
OSV
firefox vulnerabilities
osv·2025-01-09·CVSS 5.4
CVE-2025-0237 [MEDIUM] firefox vulnerabilities
firefox vulnerabilities
Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information across domains, or execute arbitrary code. (CVE-2025-0237,
CVE-2025-0239, CVE-2025-0240, CVE-2025-0242, CVE-2025-0243, CVE-2025-0247)
Irvan Kurniawan discovered that Firefox incorrectly handled memory when
breaking lines in text, leading to a use-after-free vulnerability. An
attacker could possibly use this issue to cause a denial of service or
possibly execute arbitrary code. (CVE-2025-0238)
Nils Bars discovered that Firefox incorrectly handled memory when using
JavaScript Text Segmentation. An attacker could possibly use this issue to
cause a d
GHSA
GHSA-f3xq-g93v-w8cv: Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free
ghsa_unreviewed·2025-01-07
CVE-2025-0240 [MEDIUM] CWE-416 GHSA-f3xq-g93v-w8cv: Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability affects Firefox < 134 and Firefox ESR < 128.6.
OSV
CVE-2025-0240: Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free
osv·2025-01-07·CVSS 4.0
CVE-2025-0240 [MEDIUM] CVE-2025-0240: Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1929623https://www.mozilla.org/security/advisories/mfsa2025-01/https://www.mozilla.org/security/advisories/mfsa2025-02/https://www.mozilla.org/security/advisories/mfsa2025-04/https://www.mozilla.org/security/advisories/mfsa2025-05/https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html
2025-01-07
Published