6.5

CVE-2021-22877: fedoraproject fedora Improper Access Control

CVSS: 6.5v3.1MediumModified
Published 03-03-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-22877 is a medium (CVSS 6.5) Improper Access Control vulnerability in fedoraproject fedora. EPSS estimates a 1.69% chance of exploitation in the next 30 days, higher than 76.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
1.69%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 03-03-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.69%

Chance of exploitation in the next 30 days

Percentile

77%

Versus all other CVEs

30-day change

0.00 pp

From 1.69% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.69%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Server

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Fedoraproject1 product
Nextcloud1 product

2 vendors · 2 products

References

5 links