Auth bypass in Humhub

CVE-2021-43847

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.

EPSS: 0.012 (64.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

  • Humhub — versions >= 1.10.0, < 1.10.3, < 1.9.3

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-43847?
CVE-2021-43847 is a medium-severity vulnerability in Humhub, classified under Improper Authorization. CVSS score: 6.5/10. Published 2021-12-20.
How severe is CVE-2021-43847?
Medium severity. CVSS v3 base score is 6.5 out of 10.