CVE-2023-25820
Nextcloud Server and Enterprise Server missing brute force protection on password confirmation modal
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform, and Nextcloud Enterprise Server is the enterprise version of the file server software. In Nextcloud Server versions 25.0.x prior to 25.0.5 and versions 24.0.x prior to 24.0.10 as well as Nextcloud Enterprise Server versions 25.0.x prior to 25.0.4, 24.0.x prior to 24.0.10, 23.0.x prior to 23.0.12.5, 22.x prior to 22.2.0.10, and 21.x prior to 21.0.9.10, when an attacker gets access to an already logged in user session they can then brute force the password on the confirmation endpoint. Nextcloud Server should upgraded to 24.0.10 or 25.0.4 and Nextcloud Enterprise Server should upgraded to 21.0.9.10, 22.2.10.10, 23.0.12.5, 24.0.10, or 25.0.4 to receive a patch. No known workarounds are available.
Timeline
ID reserved
By GitHub_M
- 35 days later
· 35 days later
Published
- 24 months later
· 24 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium4.2 | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.2.
Weakness
Affected products
nextcloud · security-advisories
- affected Nextcloud Server >= 24.0.0, < 24.0.10
- affected Nextcloud Server >= 25.0.0, < 25.0.4
- affected Nextcloud Enterprise Server >= 25.0.0, < 25.0.4
- affected Nextcloud Enterprise Server >= 24.0.0, < 24.0.10
- affected Nextcloud Enterprise Server >= 23.0.0, < 23.0.12.5
- affected Nextcloud Enterprise Server >= 22.0.0, < 22.2.10.10
- affected Nextcloud Enterprise Server >= 21.0.0, < 21.0.9.10
References (3)
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-36g6-wjx2-333x (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/nextcloud/server/pull/36489 (opens in a new tab)x_refsource_MISCx_transferred
- https://hackerone.com/reports/1842114 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-25820)Record last updated .