VDB

CVE-2017-18898

CVE-2017-18898 PUBLISHED CVSS 5.300000190734863 MEDIUM

Mattermost Server is vulnerable to DoS through maliciously crafted posts

Reported by mitre · Published June 19, 2020

github.com/mattermost/mattermost-server is fixed in 4.2.0+incompatible, 4.2.0, 4.1.1+incompatible and 3 more (Go Modules)

An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. It allows crafted posts that potentially cause a web browser to hang.

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

PackageEcosystemFixed in
github.com/mattermost/mattermost-serverGo Modules4.2.0+incompatible, 4.2.0, 4.1.1+incompatible, 4.1.1, 4.0.5+incompatible, 4.0.5
mattermost_servermattermost4.1.1, 4.0.5

Risk scores

CVSS 3.1
5.300000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

VendorProductVersions
n/an/an/a
github.commattermost/mattermost-server0, 4.1.0, 4.2.0-rc1
n/an/a*

Timeline

  • Jun 19, 2020 CVE Published
  • Jun 19, 2020 PoC Published
  • Apr 14, 2021 EPSS Score (30 in total, the first dated here)
  • Apr 26, 2026 Security Advisory
  • Jun 17, 2026 CVE Updated
  • Oct 1, 2026 Coalition ESS Score

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln CVE-2017-18898
vulnetix vdb fixes CVE-2017-18898

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2017-18898/fixes/registry"

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