Arbitrary file upload in Zenitel Alphacom Xe Audio Server
CVE-2021-40845
The web part of Zenitel AlphaCom XE Audio Server through 11.2.3.10, called AlphaWeb XE, does not restrict file upload in the Custom Scripts section at php/index.php. Neither the content nor extension of the uploaded files is checked, allowing execution of PHP code under the /cmd directory.
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: 0.047 (91.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.047 · newest: 0.047 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- packetstormsecurity.com/files/164149/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10… (VDB Entry, Third Party Advisory)
- github.com/ricardojoserf/CVE-2021-40845 (Exploit, Third Party Advisory)
- ricardojoserf.github.io/CVE-2021-40845/ (Exploit, Third Party Advisory)
- packetstormsecurity.com/files/164160/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10… (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-40845?
- CVE-2021-40845 is a high-severity vulnerability in Zenitel Alphacom Xe Audio Server, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2021-09-15.
- How severe is CVE-2021-40845?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-40845 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.