CVE-2023-6458
Client side path traversal due to lack of route parameters validation
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
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
- Low
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Client side path traversal due to lack of route parameters validation
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
- Record
CVE-2023-6458- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L - Weakness
- CWE-74
- Updated
- 2026-11-02
EUVDEUVD-2023-3139
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
- Record
EUVD-2023-3139- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7664-hcp7-f497
Mattermost Injection vulnerability
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
- Record
GHSA-7664-hcp7-f497- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L - Weakness
- CWE-22, CWE-74
- Updated
- 2026-11-02
NVD
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
- Record
CVE-2023-6458- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-74, CWE-22
- Updated
- 2026-11-02
OSV
Client side path traversal due to lack of route parameters validation
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
- Record
CVE-2023-6458- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L - Weakness
- CWE-74
- Updated
- 2026-11-02
OSVGHSA-7664-hcp7-f497
Mattermost Injection vulnerability
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
- Record
GHSA-7664-hcp7-f497- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L - Weakness
- CWE-22, CWE-74
- Updated
- 2026-11-02
OSVBIT-mattermost-2023-6458 No score
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
- Record
BIT-mattermost-2023-6458- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/mattermost/mattermost-server/v6Go |
before 7.8.14 | 7.8.14 |
github.com/mattermost/mattermost/server/v8Go |
before 8.1.5 | 8.1.5 |
github.com/mattermost/mattermost/server/v8Go |
9.0.0 up to 9.0.3 | 9.0.3 |
github.com/mattermost/mattermost/serverGo |
9.1.0 up to 9.1.2 | 9.1.2 |
mattermostBitnami |
before 7.8.14, 8.0.0 up to 8.1.5, 9.0.0 up to 9.0.3, 9.1.0 up to 9.1.2 | 7.8.148.1.59.0.39.1.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-6458 is a high vulnerability (CVSS 7.1) in Mattermost, published December 6, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.64%, the 51st percentile. Fixed in github.com/mattermost/mattermost-server/v6 7.8.14.