6.5

CVE-2023-29000: nextcloud desktop Improper Certificate Validation

CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2023-29000DEBIAN-CVE-2023-29000
Published 04-04-2023Last modified 11-02-2025
Open JSON

Vulnerability summary

CVE-2023-29000 is a medium (CVSS 6.5) Improper Certificate Validation vulnerability in nextcloud desktop. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.4% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.39%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 04-04-2023
    PublishedVulnerability first disclosed.
  2. 11-02-2025
    Last modifiedVulnerability information updated.

Description

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.7.0, by trusting that the server will return a certificate that belongs to the keypair of the user, a malicious server could get the desktop client to encrypt files with a key known to the attacker. This issue is fixed in Nextcloud Desktop 3.7.0. No known workarounds are available.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

0.00 pp

From 0.39% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Nextcloud2 products
Debian1 product
  • nextcloud-desktop< 3.7.0-1
Ubuntu1 product
  • nextcloud-desktopAll versions (No fix recorded)

3 vendors · 4 products

References

6 links