CVE-2023-39961
What it is
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 24.0.4 and prior to versions 25.0.9, 26.0.4, and 27.0.1, when a folder with images or an image was shared without download permissions, the user could add the image inline into a text file and download it. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.
At a glance
- Exploitability
- Can be exploited over the network with a low-privilege account, but needs a user to act. Limited direct impact.
- Exploit odds
- 0.6% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.6% in the next 30 days (EPSS).
- Severity: 3.5 LOW (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.6% · EPSS, next 30 days
- Weakness
- CWE-284 · Improper access control
- Record status
- Modified
Affected
- Nextcloud Server < 25.0.9
- Nextcloud Server < 26.0.4
- Nextcloud Server 27.0.0
Attack profile CVSS 3.1 · 3.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2023-39961.md and follow it. Check whether this project is affected by CVE-2023-39961. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qhgm-w4gx-gvgp
- https://github.com/nextcloud/text/pull/4481
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qhgm-w4gx-gvgp
- https://github.com/nextcloud/text/pull/4481
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qhgm-w4gx-gvgp
- https://github.com/nextcloud/text/pull/4481
- https://hackerone.com/reports/1965156
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qhgm-w4gx-gvgp
- https://github.com/nextcloud/text/pull/4481
- https://hackerone.com/reports/1965156