CVE-2021-37860

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Published Sep 22, 2021 CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed

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 Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Mattermost

Mattermost

affected

Version	Status	Constraints
`unspecified`	affected	≤ 5.38

Configuration 1 [-]

cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-2078	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.
Github GHSA	GHSA-hv5f-73mr-7vvj	Cross-site Scripting in Mattermost

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity High

Authentication None

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.631% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://mattermost.com/security-updates/

History

No history.

Subscriptions

Mattermost Mattermost

Weaknesses

CWE-79

Sources

CVE record Updated: Aug 4, 2024, 1:30 AM

Status: PUBLISHED
Assigner: Mattermost
Published: Sep 22, 2021, 4:40 PM
Updated: Aug 4, 2024, 1:30 AM
Reserved: Aug 2, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 4:01 AM

Status: Modified
Published: Sep 22, 2021, 5:15 PM
Modified: Jun 17, 2026, 4:01 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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