CVE-2017-18876
published 2020-06-19CVE-2017-18876: An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can test for the existence of…
PriorityP426medium4.9CVSS 3.1
AVNACLPRHUINSUCHINAN
EPSS
0.86%
54.8th percentile
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can test for the existence of an arbitrary file.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 0 < 4.1.2-0.20171004201910-6be8113eb60c | 4.1.2-0.20171004201910-6be8113eb60c |
| github.com | mattermost_mattermost-server | >= 4.2.0-rc1.0.20171004154238-fadd9514f6e7 < 4.2.1-0.20171004194140-6d3cb2ce07fc | 4.2.1-0.20171004194140-6d3cb2ce07fc |
| github.com | mattermost_mattermost-server | >= 4.3.0-rc1 < 4.3.0 | 4.3.0 |
| github.com | mattermost_mattermost-server | >= 4.3.0-rc1+incompatible < 4.3.0+incompatible | 4.3.0+incompatible |
| mattermost | mattermost_server | < 4.1.2 | 4.1.2 |
| mattermost | mattermost_server | — | — |
| mattermost | mattermost_server | >= 4.2.0 < 4.2.1 | 4.2.1 |
CVSS provenance
nvdv3.14.9MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
nvdv2.04.0MEDIUMAV:N/AC:L/Au:S/C:P/I:N/A:N
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OSV
Mattermost Server is vulnerable to Path Traversal when files are stored locally in github.com/mattermost/mattermost-server
osv·2025-12-08
CVE-2017-18876 Mattermost Server is vulnerable to Path Traversal when files are stored locally in github.com/mattermost/mattermost-server
Mattermost Server is vulnerable to Path Traversal when files are stored locally in github.com/mattermost/mattermost-server
Mattermost Server is vulnerable to Path Traversal when files are stored locally 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 before v4.1.2-0.20171004201910-6be8113eb60c, from v4.2.0-rc1.0.20171004154238-fadd9514f6e7 before v4.2.1-0.20171004194140-6d3cb2ce07fc.
GHSA
Mattermost Server is vulnerable to Path Traversal when files are stored locally
ghsa·2022-05-24
CVE-2017-18876 [MEDIUM] CWE-22 Mattermost Server is vulnerable to Path Traversal when files are stored locally
Mattermost Server is vulnerable to Path Traversal when files are stored locally
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can test for the existence of an arbitrary file.
OSV
Mattermost Server is vulnerable to Path Traversal when files are stored locally
osv·2022-05-24
CVE-2017-18876 [MEDIUM] Mattermost Server is vulnerable to Path Traversal when files are stored locally
Mattermost Server is vulnerable to Path Traversal when files are stored locally
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can test for the existence of an arbitrary file.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2020-06-19
Published