Deserialization in Orckestra C1 Cms
CVE-2021-34992
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Orckestra C1 CMS 6.10. Authentication is required to exploit this vulnerability. The specific flaw exists within Composite.dll. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-14740.
Vulnerability class: Insecure Deserialization
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: 0.043 (90.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.041 · newest: 0.043 · change: +0.001
Affected products
- Orckestra C1 Cms — versions 6.10
- Orckestra C1 Cms — versions 6.10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.zerodayinitiative.com/advisories/ZDI-21-1304/ (VDB Entry, Third Party Advisory)
- github.com/Orckestra/C1-CMS-Foundation/releases/tag/v6.11 (Patch, Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2021-34992?
- CVE-2021-34992 is a high-severity vulnerability in Orckestra C1 Cms, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2021-11-15.
- How severe is CVE-2021-34992?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-34992 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.