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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.012 (66.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Humhub — versions >= 1.10.0, < 1.10.3, < 1.9.3
Weakness classification (CWE)
References
- github.com/humhub/humhub/security/advisories/GHSA-f5hc-5wfr-7v74 (Exploit, Third Party Advisory)
- github.com/humhub/humhub/pull/5473 (Patch, Third Party Advisory)
- github.com/humhub/humhub/releases/tag/v1.10.3 (Third Party Advisory, Release Notes)
- github.com/humhub/humhub/releases/tag/v1.9.3 (Third Party Advisory, Release Notes)
- huntr.dev/bounties/943dad83-f0ed-4c74-ba81-7dfce7ca0ef2/ (Exploit, Patch, Third Party Advisory, Issue Tracking)
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.