Unauthorized channel posting via command permission bypass
Published Jun 16, 2023 · Updated Dec 6, 2024
Missing authorization in Mattermost allows remote authenticated users to post messages in channels where their posting permission is denied. The channel-command execution path fails to enforce the channel's posting permission before accepting a command-generated message. Affected members need an account but no permission to create posts; successful exploitation inserts unauthorized content into the channel.
Summary
What happened
Missing authorization in Mattermost allows remote authenticated users to post messages in channels where their posting permission is denied. The channel-command execution path fails to enforce the channel's posting permission before accepting a command-generated message. Affected members need an account but no permission to create posts; successful exploitation inserts unauthorized content into the channel.
The record
- CVE
- CVE-2023-2786
- Published
- Jun 16, 2023
- Updated
- Dec 6, 2024
- Vendor
- Mattermost
- Product
- Mattermost
- Classifications
- CWE-862, T1565.002
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 16, 2023CVE publishedPublication date reported by the CVE source.
- Dec 6, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=7.1.9
- Affected versionversion=0 <=7.8.4
- Affected versionversion=0 <=7.9.3
- Affected versionversion=7.10.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo