CVE-2020-8477
No exploitation reported by the sources we read.
- Published2020-04-22
- WeaknessCWE-489 · CWE-79
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
The installations for ABB System 800xA Information Manager versions 5.1, 6.0 to 6.0.3.2 and 6.1 wrongly contain an auxiliary component. An attacker is able to use this for an XSS-like attack to an authenticated local user, which might lead to execution of arbitrary code.
Timeline
dates in UTC- 2020-04-2215:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-8477?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-8477?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.0 | ≥ 6.0.0, ≤ 6.0.3.2 | no fix published | NVD |
| 5.1 | = 5.1 | no fix published | NVD |
| 6.1 | = 6.1 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
ABB System 800xA Information Manager
System 800xA Information Manager: Versions prior to 6.0.3.3 RU1 · System 800xA Information Manager: Versions prior to 5.1 Rev E/5.1 FP4 Rev E TC6 · System 800xA Information Manager: Versions prior to 6.1 RU1
Fix
- Mitigation from the vendor CISA ICSA-20-184-02 · 3 productsThis vulnerability was corrected in System 800xA of the following versions: 5.1 Rev E/5.1 FP4 E TC6, ABB recommends users on the 5.1 track to install this TC, which can be obtained from technical support upon request.
- Mitigation from the vendor CISA ICSA-20-184-02 · 3 productsThis vulnerability was corrected in System 800xA of the following versions: 6.0.3.3 RU1, ABB recommends users on the 6.0.3 LTS track to update 6.0.3.3 and install RU1 for IM.
- Mitigation from the vendor CISA ICSA-20-184-02 · 3 productsThis vulnerability was corrected in System 800xA of the following versions: 6.1 RU1, ABB recommends users on the 6.1 track to update to this version.
- Mitigation from the vendor CISA ICSA-20-184-02 · 3 productsThe above-mentioned updates are recommended regardless of whether the previously described manual removal of the vulnerable component has been done or not. The IM rollups for 6.0.3.3 and 6.1 can be downloaded from My ABB/My Control System.
- Mitigation from the vendor CISA ICSA-20-184-02 · 3 productsPlease note this vulnerability can be exploited by remote and unauthenticated users, so users are recommended to ensure only authorized persons have access to plant assets and network and that web browsing from system nodes to external networks is restricted, especially from an IM node.
- Mitigation from the vendor CISA ICSA-20-184-02 · 3 productsCheck that the usage of the Access Enable key in AC 800M HI and the configured access level of SIL variables corresponds to the risk analysis.
Advisories and patches
- search.abb.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- 2020-04-22
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-8477?
Is CVE-2020-8477 actively exploited?
What is the CVSS score for CVE-2020-8477?
Running ABB System 800xA Information? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.