CVE-2022-39330 [Medium] | Denial of Service in Nextcloud Enterprise Server

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Nextcloud Server prior to versions 23.0.10 and 24.0.6 and Nextcloud Enterprise Server prior to versions 22.2.10, 23.0.10, and 24.0.6 are vulnerable to a logged-in attacker slowing down the system by generating a lot of database/cpu load. Nextcloud Server versions 23.0.10 and 24.0.6 and Nextcloud Enterprise Server versions 22.2.10, 23.0.10, and 24.0.6 contain patches for this issue. As a workaround, disable the Circles app.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.41%	0.82%	+0.40%
2	2026-04-22	0.34%	0.41%	+0.08%
3	2025-11-21	—	0.34%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.41%

0.82%

+0.40%

2026-04-22

0.34%

0.41%

+0.08%

2025-11-21

—

0.34%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
4.8	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.2	3.6	[email protected]
4.3	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	2.8	1.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

4.8

3.1

MEDIUM

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.2

3.6

[email protected]

4.3

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

2.8

1.4

[email protected]

Affected software / configurations for CVE-2022-39330

Vendor	Product	Version	Raw CPE
nextcloud	nextcloud_enterprise_server	< 22.2.10	cpe:2.3:a:nextcloud:nextcloud_enterprise_server::::::::
nextcloud	nextcloud_enterprise_server	>= 23.0.0, < 23.0.10	cpe:2.3:a:nextcloud:nextcloud_enterprise_server::::::::
nextcloud	nextcloud_enterprise_server	>= 24.0.0, < 24.0.6	cpe:2.3:a:nextcloud:nextcloud_enterprise_server::::::::
nextcloud	nextcloud_server	< 23.0.10	cpe:2.3:a:nextcloud:nextcloud_server::::::::
nextcloud	nextcloud_server	>= 24.0.0, < 24.0.6	cpe:2.3:a:nextcloud:nextcloud_server::::::::

References for CVE-2022-39330

URL	Tags
https://github.com/nextcloud/circles/pull/1147	Patch Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wxx7-w5p4-7x4c	Third Party Advisory
https://hackerone.com/reports/1688199	Permissions Required Third Party Advisory

URL

CVE-2022-39330 | Database resource exhaustion for logged-in users via sharee recommendations with circles

Exploit prediction scoring system (EPSS) score for CVE-2022-39330

Common vulnerability scoring system (CVSS) metrics for CVE-2022-39330

Weakness enumeration for CVE-2022-39330

Affected software / configurations for CVE-2022-39330

References for CVE-2022-39330