CVE-2020-24677
Insecure Web Service in Symphony Plus
Vulnerabilities in the S+ Operations and S+ Historian web applications can lead to a possible code execution and privilege escalation, redirect the user somewhere else or download unwanted data.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Insecure Web Service in Symphony Plus
Vulnerabilities in the S+ Operations and S+ Historian web applications can lead to a possible code execution and privilege escalation, redirect the user somewhere else or download unwanted data.
- Record
CVE-2020-24677- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-754
- Updated
- 2026-11-02
EUVDEUVD-2020-17391
Vulnerabilities in the S+ Operations and S+ Historian web applications can lead to a possible code execution and privilege escalation, redirect the user somewhere else or download unwanted data.
- Record
EUVD-2020-17391- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fcfx-pc78-jw2m No score
Vulnerabilities in the S+ Operations and S+ Historian web applications can lead to a possible...
Vulnerabilities in the S+ Operations and S+ Historian web applications can lead to a possible code execution and privilege escalation, redirect the user somewhere else or download unwanted data.
- Record
GHSA-fcfx-pc78-jw2m- Weakness
- CWE-754
- Updated
- 2026-11-02
NVD
Vulnerabilities in the S+ Operations and S+ Historian web applications can lead to a possible code execution and privilege escalation, redirect the user somewhere else or download unwanted data.
- Record
CVE-2020-24677- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-754
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-24677 is a high vulnerability (CVSS 8.8) in Abb Ability™ Symphony® Plus Historian, published December 22, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.45%, the 73rd percentile. No source names a fixed version.