CVE-2019-18211
CVE-2019-18211 is a high-severity vulnerability in Orckestra C1 Cms with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.5
- EPSS exploit prediction: 3% (85th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-502
- Affected product: Orckestra C1 Cms
- Published:
- Last modified:
Description
An issue was discovered in Orckestra C1 CMS through 6.6. The EntityTokenSerializer class in Composite.dll is prone to unvalidated deserialization of wrapped BinaryFormatter payloads, leading to arbitrary remote code execution for any low-privilege user.
Frequently asked questions
- What is CVE-2019-18211?
- An issue was discovered in Orckestra C1 CMS through 6.6. The EntityTokenSerializer class in Composite.dll is prone to unvalidated deserialization of wrapped BinaryFormatter payloads, leading to arbitrary remote code execution for any low-privilege user.
- How severe is CVE-2019-18211?
- CVE-2019-18211 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-18211 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-18211?
- CVE-2019-18211 affects Orckestra C1 Cms. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2019-18211?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2019-18211 published?
- CVE-2019-18211 was published on 2019-12-23 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:orckestra:c1_cms:*:*:*:*:*:*:*:*
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