6.5

CVE-2021-43847: humhub Improper Authorization

CVSS: 6.5v3.1MediumModified
Published 20-12-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-43847 is a medium (CVSS 6.5) Improper Authorization vulnerability in humhub. EPSS estimates a 1.22% chance of exploitation in the next 30 days, higher than 68.3% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.22%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2github, reference

Timeline

  1. 20-12-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

HumHub is an open-source social network kit written in PHP. Prior to HumHub version 1.10.3 or 1.9.3, it could be possible for registered users to become unauthorized members of private Spaces. Versions 1.10.3 and 1.9.3 contain a patch for this issue.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.22%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

+0.04 pp

From 1.18% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

2 found
  • githubUnverified

    Humhub

    Maturity: poc

  • referenceUnverified

    Exploit Reference (huntr.dev)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Humhub1 product
  • humhub< 1.9.3 | ≥ 1.10.0, < 1.10.3

1 vendor · 1 product

References

5 links