TI-2022-08555 Aliases CVE-2022-24741

High memory usage in Nextcloud server

MEDIUM 62CWE-400Published 2022-03-09 · Updated 2025-04-22

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.

Summary

Nextcloud server is an open source, self hosted cloud style services platform. In affected versions an attacker can cause a denial of service by uploading specially crafted files which will cause the server to allocate too much memory / CPU. It is recommended that the Nextcloud Server is upgraded to 21.0.8 , 22.2.4 or 23.0.1. Users unable to upgrade should disable preview generation with the `'enable_previews'` config flag.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01606 76th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed security-advisories (nextcloud): 21.0.8, 22.2.4, 23.0.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
nextcloud	security-advisories	before 21.0.8; 22.0.0 to before 22.2.4; 23.0.0 to before 23.0.1	21.0.8, 22.2.4, 23.0.1	Patch available	CNA

security-advisories Vendornextcloud Affected before 21.0.8; 22.0.0 to before 22.2.4; 23.0.0 to before 23.0.1 Fixed in 21.0.8, 22.2.4, 23.0.1 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:nextcloud:nextcloud_server::::::::	21.0.0 to before 21.0.8; 22.0.0 to before 22.2.4	Vulnerable	nextcloud
cpe:2.3:a:nextcloud:nextcloud_server:23.0.0:::::::*	23.0.0	Vulnerable	nextcloud

cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* Versions 21.0.0 to before 21.0.8; 22.0.0 to before 22.2.4 Vulnerable ·nextcloud
cpe:2.3:a:nextcloud:nextcloud_server:23.0.0:*:*:*:*:*:*:* Versions 23.0.0 Vulnerable ·nextcloud

Remediation

Fix · CNA security-advisories (nextcloud) Fixed in 21.0.8, 22.2.4, 23.0.1

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2022-24741

References

Exploit 1

https://hackerone.com/reports/1261225

Patch 1

https://github.com/nextcloud/server/pull/30291

Advisory 2

TI-2023-20855 Users can delete external storage mount points CVSS 3.1HIGH 7.7
TI-2023-11091 Nextcloud download permissions can be changed by resharer CVSS 3.1HIGH 7.5
TI-2023-10624 Nextcloud Server vulnerable to SSRF via filter bypass due to lax checking on IPs CVSS 3.1MEDIUM 5.3
TI-2025-37238 Cross-site scripting in Nextcloud CVSS 3.1MEDIUM 6.4
TI-2023-11086 nextcloud vulnerable to Uncontrolled Resource Consumption CVSS 3.1MEDIUM 6.5
TI-2022-18738 Exception logging in Sharepoint app reveals clear-text connection details CVSS 3.1MEDIUM 6.5

See all 188 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences