Vulnerability · Published Sep 22, 2021 · Assigned by Mattermost
CVE-2021-37860
Low 3.7
In plain English
A low-severity cross-site scripting in Mattermost from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.6%top 49.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Mattermost 5.38 and earlier fails to sufficiently sanitize clipboard contents, which allows a user-assisted attacker to inject arbitrary web script in product deployments that explicitly disable the default CSP.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | no fix listed | GO-2022-0604 |
| Go | github.com/mattermost/mattermost-server/v5 | 5.39.0 | GHSA-hv5f-73mr-7vvj |
| Go | github.com/mattermost/mattermost-server/v5 | 5.39.0 | GO-2022-0604 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | unspecified – through 5.38 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
References
- https://mattermost.com/security-updates/ x_refsource_MISC