CVE-2021-22878

View on CVE.org

Published Mar 3, 2021 CVSS 3.1 · 4.8 Medium EPSS 1.1% KEV · Not listed

Description

Nextcloud Server prior to 20.0.6 is vulnerable to reflected cross-site scripting (XSS) due to lack of sanitization in `OC.Notification.show`.

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

n/a

Nextcloud Server

affected

Version	Status	Constraints
`Fixed in 20.0.6`	affected	—

Configuration 1 [-]

cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*

Configuration 2 [-]

cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-10013	Nextcloud Server prior to 20.0.6 is vulnerable to reflected cross-site scripting (XSS) due to lack of sanitization in `OC.Notification.show`.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication Single

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: 1.1% (1.059% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/nextcloud/server/pull/25234
https://hackerone.com/reports/896522
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/
https://nextcloud.com/security/advisory/?id=NC-SA-2021-005

History

No history.

Subscriptions

Fedoraproject Fedora

Nextcloud Nextcloud Server

Weaknesses

CWE-79

Sources

CVE record Updated: Aug 3, 2024, 6:51 PM

Status: PUBLISHED
Assigner: hackerone
Published: Mar 3, 2021, 5:39 PM
Updated: Aug 3, 2024, 6:51 PM
Reserved: Jan 6, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:37 AM

Status: Modified
Published: Mar 3, 2021, 6:15 PM
Modified: Jun 17, 2026, 3:37 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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