CVE-2017-18871

unknown

Published 2022-05-24 · Modified 2026-03-03

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

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

CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server

Predictions

Exploit likelihood

30%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	github.com/mattermost/mattermost-server	`<4.2.2`	`4.2.2`
Go	github.com/mattermost/mattermost-server	`>=4.3.0-rc1,<4.3.4`	`4.3.4`
Go	github.com/mattermost/mattermost-server	`>=4.4.0-rc1,<4.4.5`	`4.4.5`
Go	github.com/mattermost/mattermost-server	`>=4.5.0-rc1,<4.5.0`	`4.5.0`
Go	github.com/mattermost/mattermost-server	`>=4.5.0-rc1+incompatible,<4.5.0+incompatible`	`4.2.2+incompatible`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.