CVE-2023-50333
Lack of restriction to manage group names for freshly demoted guests
Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Lack of restriction to manage group names for freshly demoted guests
Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.
- Record
CVE-2023-50333- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L - Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2024-0319
Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.
- Record
EUVD-2024-0319- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9w97-9rqx-8v4j
Mattermost allows demoted guests to change group names
Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.
- Record
GHSA-9w97-9rqx-8v4j- CVSS 4.0
- 2.1 Low
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N - CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L - Weakness
- CWE-284
- Updated
- 2026-11-02
NVD
Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.
- Record
CVE-2023-50333- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L - CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-284
- Updated
- 2026-11-02
OSV
Lack of restriction to manage group names for freshly demoted guests
Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.
- Record
CVE-2023-50333- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L - Weakness
- CWE-284
- Updated
- 2026-11-02
OSVGHSA-9w97-9rqx-8v4j
Mattermost allows demoted guests to change group names
Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.
- Record
GHSA-9w97-9rqx-8v4j- CVSS 4.0
- 2.1 Low
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N - CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L - Weakness
- CWE-284
- Updated
- 2026-11-02
OSVBIT-mattermost-2023-50333 No score
Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.
- Record
BIT-mattermost-2023-50333- Updated
- 2026-11-02
OSVGO-2024-2444 No score
Mattermost allows demoted guests to change group names in github.com/mattermost/mattermost-server
Mattermost allows demoted guests to change group names 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 v8.1.7.
- Record
GO-2024-2444- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/mattermost/mattermost/server/v8Go |
through 8.1.6 | 8.1.7 |
mattermostBitnami |
before 8.1.7 | 8.1.7 |
github.com/mattermost/mattermost/server/v8Go |
before 8.1.7 | 8.1.7 |
github.com/mattermost/mattermost-serverGo |
All versions | None known |
github.com/mattermost/mattermost-server/v5Go |
All versions | None known |
github.com/mattermost/mattermost-server/v6Go |
All versions | None known |
github.com/mattermost/mattermost/server/v8Go |
All versions | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-50333 is a low vulnerability (CVSS 3.7) in Mattermost, published January 2, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 25th percentile. Fixed in github.com/mattermost/mattermost/server/v8 8.1.7.
References
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2023-50333
github.com/mattermost/mattermost/commit/61dd452fb2fcd3ac6f7b2e050f7f0a93a92d95fc