CVE-2017-18871
published 2020-06-19CVE-2017-18871: An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service (application crash) via an…
PriorityP428high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
1.11%
62.6th percentile
An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service (application crash) via an @ character before a JavaScript field name.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 0 < 4.2.2+incompatible | 4.2.2+incompatible |
| github.com | mattermost_mattermost-server | >= 0 < 4.2.2 | 4.2.2 |
| github.com | mattermost_mattermost-server | >= 4.3.0-rc1 < 4.3.4 | 4.3.4 |
| github.com | mattermost_mattermost-server | >= 4.3.0-rc1+incompatible < 4.3.4+incompatible | 4.3.4+incompatible |
| github.com | mattermost_mattermost-server | >= 4.4.0-rc1 < 4.4.5 | 4.4.5 |
| github.com | mattermost_mattermost-server | >= 4.4.0-rc1+incompatible < 4.4.5+incompatible | 4.4.5+incompatible |
| github.com | mattermost_mattermost-server | >= 4.5.0-rc1 < 4.5.0 | 4.5.0 |
| github.com | mattermost_mattermost-server | >= 4.5.0-rc1+incompatible < 4.5.0+incompatible | 4.5.0+incompatible |
| mattermost | mattermost_server | < 4.2.2 | 4.2.2 |
| mattermost | mattermost_server | — | — |
| mattermost | mattermost_server | >= 4.3.0 < 4.3.4 | 4.3.4 |
| mattermost | mattermost_server | >= 4.4.0 < 4.4.5 | 4.4.5 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
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OSV
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server
osv·2025-12-08
CVE-2017-18871 Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server
OSV
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names
osv·2022-05-24
CVE-2017-18871 [HIGH] Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names
An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service (application crash) via an @ character before a JavaScript field name.
GHSA
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names
ghsa·2022-05-24
CVE-2017-18871 [HIGH] CWE-248 Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names
An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service (application crash) via an @ character before a JavaScript field name.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2020-06-19
Published