Arbitrary file upload in Limesurvey
CVE-2021-44967
A Remote Code Execution (RCE) vulnerabilty exists in LimeSurvey 5.2.4 via the upload and install plugins function, which could let a remote malicious user upload an arbitrary PHP code file. NOTE: the Supplier's position is that plugins intentionally can contain arbitrary PHP code, and can only be installed by a superadmin, and therefore the security model is not violated by this finding.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.135 (96.4th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.135 · newest: 0.135 · change: 0.000
Affected products
- Limesurvey — versions 5.2.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.exploit-db.com/exploits/50573 (Exploit, VDB Entry, Third Party Advisory)
- github.com/Y1LD1R1M-1337/Limesurvey-RCE (Exploit, Third Party Advisory)
- www.limesurvey.org/manual/Plugins_-_advanced
Frequently asked questions
- What is CVE-2021-44967?
- CVE-2021-44967 is a high-severity vulnerability in Limesurvey, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2022-02-24.
- How severe is CVE-2021-44967?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-44967 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.