9.8

CVE-2023-49792: nextcloud nextcloud_server

CVSS: 9.8v3.1CriticalModified
Published 22-12-2023Last modified 27-08-2024
Open JSON

Vulnerability summary

CVE-2023-49792 is a critical (CVSS 9.8) vulnerability in nextcloud nextcloud_server. EPSS estimates a 1.04% chance of exploitation in the next 30 days, higher than 63.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.04%
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. 22-12-2023
    PublishedVulnerability first disclosed.
  2. 27-08-2024
    Last modifiedVulnerability information updated.

Description

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server prior to versions 26.0.9 and 27.1.4; as well as Nextcloud Enterprise Server prior to versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4; when a (reverse) proxy is configured as trusted proxy the server could be tricked into reading a wrong remote address for an attacker, allowing them executing authentication attempts than intended. Nextcloud Server versions 26.0.9 and 27.1.4 and Nextcloud Enterprise Server versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4 contain a patch for this issue. No known workarounds are available.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.04%

Chance of exploitation in the next 30 days

Percentile

64%

Versus all other CVEs

30-day change

0.00 pp

From 1.04% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.04%

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
  • nextcloud_server≥ 23.0.0, < 23.0.12.13 | ≥ 24.0.0, < 24.0.12.9 | ≥ 25.0.0, < 25.0.13.4 | ≥ 26.0.0, < 26.0.9 | ≥ 27.0.0, < 27.1.4
  • security-advisories≥ 23.0.0, < 23.0.12.13 | ≥ 24.0.0, < 24.0.12.9 | ≥ 25.0.0, < 25.0.13.4 | ≥ 26.0.0, < 26.0.9 | ≥ 27.0.0, < 27.1.4

1 vendor · 2 products

References

3 links