CVE-2020-24683
CVE-2020-24683 is a critical-severity vulnerability in Abb Symphony + Historian with a CVSS 3.x base score of 9.8. 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-669.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (69th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-669
- Affected product: Abb Symphony + Historian
- Published:
- Last modified:
Description
The affected versions of S+ Operations (version 2.1 SP1 and earlier) used an approach for user authentication which relies on validation at the client node (client-side authentication). This is not as secure as having the server validate a client application before allowing a connection. Therefore, if the network communication or endpoints for these applications are not protected, unauthorized actors can bypass authentication and make unauthorized connections to the server application.
Frequently asked questions
- What is CVE-2020-24683?
- The affected versions of S+ Operations (version 2.1 SP1 and earlier) used an approach for user authentication which relies on validation at the client node (client-side authentication). This is not as secure as having the server validate a client application before allowing a connection. Therefore, if the network communication or endpoints for these applications are not protected, unauthorized actors can bypass authentication and make unauthorized connections to the server application.
- How severe is CVE-2020-24683?
- CVE-2020-24683 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-24683 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-24683?
- CVE-2020-24683 primarily affects Abb Symphony + Historian. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2020-24683?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2020-24683 published?
- CVE-2020-24683 was published on 2020-12-22 and last updated on 2026-06-17.
References
Affected products (10)
- cpe:2.3:a:abb:symphony_\+_historian:3.0:*:*:*:*:*:*:*
- cpe:2.3:a:abb:symphony_\+_historian:3.1:*:*:*:*:*:*:*
- cpe:2.3:a:abb:symphony_\+_operations:1.1:*:*:*:*:*:*:*
- cpe:2.3:a:abb:symphony_\+_operations:2.0:*:*:*:*:*:*:*
- cpe:2.3:a:abb:symphony_\+_operations:2.1:sp1:*:*:*:*:*:*
- cpe:2.3:a:abb:symphony_\+_operations:2.1:sp2:*:*:*:*:*:*
- cpe:2.3:a:abb:symphony_\+_operations:3.0:*:*:*:*:*:*:*
- cpe:2.3:a:abb:symphony_\+_operations:3.1:*:*:*:*:*:*:*
- cpe:2.3:a:abb:symphony_\+_operations:3.2:*:*:*:*:*:*:*
- cpe:2.3:a:abb:symphony_\+_operations:3.3:*:*:*:*:*:*:*
More vulnerabilities in Abb Symphony + Historian
- CVE-2020-24675 — Critical (CVSS 9.8): In S+ Operations and S+ History, it is possible that an unauthenticated user could inject values to the Operations…
- CVE-2020-24673 — Critical (CVSS 9.8): In S+ Operations and S+ Historian, a successful SQL injection exploit can read sensitive data from the database, modify…
- CVE-2020-24678 — High (CVSS 8.8): An authenticated user might execute malicious code under the user context and take control of the system. S+ Operations…
- CVE-2020-24677 — High (CVSS 8.8): Vulnerabilities in the S+ Operations and S+ Historian web applications can lead to a possible code execution and…
- CVE-2020-24674 — High (CVSS 8.8): In S+ Operations and S+ Historian, not all client commands correctly check user permission as expected. Authenticated…
- CVE-2020-24676 — High (CVSS 7.8): In Symphony Plus Operations and Symphony Plus Historian, some services can be vulnerable to privilege escalation…
All CVEs affecting Abb Symphony + Historian →
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