CVE-2025-9076
published 2025-09-15CVE-2025-9076: Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or…
PriorityP339medium6.5CVSS 3.1
AVNACLPRLUINSUCHINAN
EPSS
0.24%
15.5th percentile
Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or compromised remote clusters to access sensitive user information via unsanitized user objects. This vulnerability affects Mattermost Server instances with shared channels enabled.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 10.10.0 < 10.10.2 | 10.10.2 |
| github.com | mattermost_mattermost-server | >= 10.10.0+incompatible < 10.10.2+incompatible | 10.10.2+incompatible |
| github.com | mattermost_mattermost_server_v8 | >= 0 < 8.0.0-20250729073403-517ae758cd02 | 8.0.0-20250729073403-517ae758cd02 |
| mattermost | mattermost | 10.10.0 – 10.10.1 | — |
| mattermost | mattermost_server | >= 10.10.0 < 10.10.2 | 10.10.2 |
| msrc | cbl_mariner_1.0_arm | — | — |
| msrc | cbl_mariner_1.0_x64 | — | — |
| msrc | cm1_binutils_2.32-4_on_cbl_mariner_1.0 | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vendor_msrc5.5MEDIUM
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OSV
Mattermost Missing Authorization vulnerability in github.com/mattermost/mattermost-server
osv·2025-09-17
CVE-2025-9076 Mattermost Missing Authorization vulnerability in github.com/mattermost/mattermost-server
Mattermost Missing Authorization vulnerability in github.com/mattermost/mattermost-server
Mattermost Missing Authorization vulnerability in github.com/mattermost/mattermost-server.
NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.
(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)
The additional affected modules and versions are: github.com/mattermost/mattermost/server/v8 before v8.0.0-20250729073403-517ae758cd02.
GHSA
Mattermost Missing Authorization vulnerability
ghsa·2025-09-15
CVE-2025-9076 [MEDIUM] CWE-862 Mattermost Missing Authorization vulnerability
Mattermost Missing Authorization vulnerability
Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or compromised remote clusters to access sensitive user information via unsanitized user objects. This vulnerability affects Mattermost Server instances with shared channels enabled.
OSV
Mattermost Missing Authorization vulnerability
osv·2025-09-15
CVE-2025-9076 [MEDIUM] Mattermost Missing Authorization vulnerability
Mattermost Missing Authorization vulnerability
Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or compromised remote clusters to access sensitive user information via unsanitized user objects. This vulnerability affects Mattermost Server instances with shared channels enabled.
Microsoft
An issue was discovered in the Binary File Descriptor (BFD) library (aka libbfd) as distributed in GNU Binutils 2.32. It is an attempted excessive memory allocation in elf_read_notes in elf.c.
vendor_msrc·2019-02-12·CVSS 5.5
CVE-2019-9076 [MEDIUM] CWE-770 An issue was discovered in the Binary File Descriptor (BFD) library (aka libbfd) as distributed in GNU Binutils 2.32. It is an attempted excessive memory allocation in elf_read_notes in elf.c.
An issue was discovered in the Binary File Descriptor (BFD) library (aka libbfd) as distributed in GNU Binutils 2.32. It is an attempted excessive memory allocation in elf_read_notes in elf.c.
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
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-09-15
Published