CVE-2021-41233

Name: CVE-2021-41233
Creator: NVD / NIST
Published: 2022-03-10T21:15:13.213+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.76%

Last modified Jun 17, 2026

CVE-2021-41233 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Nextcloud text is a collaborative document editing using Markdown built for the nextcloud server. Due to an issue with the Nextcloud Text application, which is by default shipped with Nextcloud Server, an attacker is able to access the folder names of "File Drop". EPSS estimates a 0.76% chance of exploitation in the next 30 days.

Description

Nextcloud text is a collaborative document editing using Markdown built for the nextcloud server. Due to an issue with the Nextcloud Text application, which is by default shipped with Nextcloud Server, an attacker is able to access the folder names of "File Drop". For successful exploitation an attacker requires knowledge of the sharing link. It is recommended that users upgrade their Nextcloud Server to 20.0.14, 21.0.6 or 22.2.1. Users unable to upgrade should disable the Nextcloud Text application in the application settings.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.76%

50.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	< 20.0.14
Nextcloud	Nextcloud Server	>= 21.0.0, < 21.0.6
Nextcloud	Nextcloud Server	>= 22.2.0, < 22.2.1

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-26c8-35cm-xq9mThird Party Advisory
https://github.com/nextcloud/text/pull/1884Patch, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-26c8-35cm-xq9mThird Party Advisory
https://github.com/nextcloud/text/pull/1884Patch, Third Party Advisory

Timeline

Published: Mar 10, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41233?

How severe is CVE-2021-41233?

CVE-2021-41233 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41233?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41233?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST