CVE-2025-4087
published 2025-04-29CVE-2025-4087: A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This…
PriorityP423medium4.8CVSS 3.1
AVNACHPRNUINSUCLILAN
EPSS
0.28%
20.3th percentile
A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 138.0-1 (sid) | firefox 138.0-1 (sid) |
| debian | firefox-esr | < firefox 138.0-1 (sid) | firefox 138.0-1 (sid) |
| debian | thunderbird | < firefox 138.0-1 (sid) | firefox 138.0-1 (sid) |
| mozilla | firefox | < 128.10 | 128.10 |
| mozilla | firefox | < 138.0 | 138.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 128.10.0 | 128.10.0 |
| mozilla | thunderbird | < 138.0 | 138.0 |
| mozilla | thunderbird | >= 0 < 1:128.10.1esr-1~deb11u1 | 1:128.10.1esr-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:128.10.0esr-1~deb12u1 | 1:128.10.0esr-1~deb12u1 |
| mozilla | thunderbird | >= 0 < 1:128.10.0esr-1 | 1:128.10.0esr-1 |
| mozilla | thunderbird | >= 0 < 1:128.10.0esr-1 | 1:128.10.0esr-1 |
| msrc | azl3_ipxe_1.21.1-1_on_azure_linux_3.0 | — | — |
CVSS provenance
nvdv3.14.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
osv4.8MEDIUM
vendor_debian4.8MEDIUM
vendor_redhat4.8MEDIUM
vendor_msrc2.6LOW
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Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2025-07-22
CVE-2025-4083 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: This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart thunderbird to
make all the necessary changes.
Red Hat
firefox: thunderbird: Unsafe attribute access during XPath parsing
vendor_redhat·2025-04-29·CVSS 4.8
CVE-2025-4087 [MEDIUM] CWE-125 firefox: thunderbird: Unsafe attribute access during XPath parsing
firefox: thunderbird: Unsafe attribute access during XPath parsing
A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Thunderbird < 138, and Thunderbird < 128.10.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: A vulnerability was identified in Firefox where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption.
Statement: Red Hat Product Security rates the severity of
Debian
CVE-2025-4087: firefox - A vulnerability was identified in Thunderbird where XPath parsing could trigger ...
vendor_debian·2025·CVSS 4.8
CVE-2025-4087 [MEDIUM] CVE-2025-4087: firefox - A vulnerability was identified in Thunderbird where XPath parsing could trigger ...
A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Thunderbird < 138, and Thunderbird < 128.10.
Scope: local
sid: resolved (fixed in 138.0-1)
Microsoft
iPXE TLS tls.c tls_new_ciphertext information exposure
vendor_msrc·2022-11-08·CVSS 2.6
CVE-2022-4087 [LOW] CWE-284 iPXE TLS tls.c tls_new_ciphertext information exposure
iPXE TLS tls.c tls_new_ciphertext information exposure
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
VulDB: VulDB
Customer Action Required: Yes
Mozilla
Mozilla Foundation Security Advisory 2025-28: CVE-2025-4087
vendor_mozilla·CVSS 4.8
CVE-2025-4087 [MEDIUM] Mozilla Foundation Security Advisory 2025-28: CVE-2025-4087
Mozilla Foundation Security Advisory 2025-28
CVE: CVE-2025-4087
Product: Firefox
Impact: high
Fixed in: Firefox 138
Mozilla
Mozilla Foundation Security Advisory 2025-31: CVE-2025-4087
vendor_mozilla·CVSS 4.8
CVE-2025-4087 [MEDIUM] Mozilla Foundation Security Advisory 2025-31: CVE-2025-4087
Mozilla Foundation Security Advisory 2025-31
CVE: CVE-2025-4087
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 138
Mozilla
Mozilla Foundation Security Advisory 2025-29: CVE-2025-4087
vendor_mozilla·CVSS 4.8
CVE-2025-4087 [MEDIUM] Mozilla Foundation Security Advisory 2025-29: CVE-2025-4087
Mozilla Foundation Security Advisory 2025-29
CVE: CVE-2025-4087
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 128.10
Mozilla
Mozilla Foundation Security Advisory 2025-32: CVE-2025-4087
vendor_mozilla·CVSS 4.8
CVE-2025-4087 [MEDIUM] Mozilla Foundation Security Advisory 2025-32: CVE-2025-4087
Mozilla Foundation Security Advisory 2025-32
CVE: CVE-2025-4087
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 128.10
OSV
CVE-2025-4087: A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access
osv·2025-04-29·CVSS 4.8
CVE-2025-4087 [MEDIUM] CVE-2025-4087: A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access
A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Thunderbird < 138, and Thunderbird < 128.10.
GHSA
GHSA-3mvr-vp9h-cr29: A vulnerability was identified in Firefox where XPath parsing could trigger undefined behavior due to missing null checks during attribute access
ghsa_unreviewed·2025-04-29
CVE-2025-4087 [MEDIUM] CWE-125 GHSA-3mvr-vp9h-cr29: A vulnerability was identified in Firefox where XPath parsing could trigger undefined behavior due to missing null checks during attribute access
A vulnerability was identified in Firefox where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Thunderbird < 138, and Thunderbird ESR < 128.10.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1952465https://www.mozilla.org/security/advisories/mfsa2025-28/https://www.mozilla.org/security/advisories/mfsa2025-29/https://www.mozilla.org/security/advisories/mfsa2025-31/https://www.mozilla.org/security/advisories/mfsa2025-32/https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html
2025-04-29
Published