CVE-2020-2883
CriticalExploitedPublic exploitEasily exploitable vulnerability allows unauthenticated attacker with network access via IIOP, T3 to compromise Oracle WebLogic Server.
Published Apr 15, 2020 · Updated Jan 12, 2026
Key Facts
Patch immediately- CVE-2020-2883 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting WebLogic Server (Oracle).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 30, 2020. Public exploit code is available.
- EPSS estimates a 95% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
95%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP, T3 to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.0 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jan 7, 2025 | Jan 28, 2025 | Not reported |
| Industry KEV feed | Apr 30, 2020 | Jan 28, 2025 | Not reported |
| CIRCL KEV | Jan 7, 2025 | Jan 28, 2025 | Not reported |
| ENISA EUVD | Jan 7, 2025 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
5 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| WebLogic ServerOracle | 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, >= 10.3.6.0.0 | n/a |
Timeline
Publicly disclosed
Apr 15, 2020
Added to Industry KEV feed
Apr 30, 2020
Added to CISA KEV
Jan 7, 2025
Added to CIRCL KEV
Jan 7, 2025
Added to ENISA EUVD
Jan 7, 2025
Last updated
Jan 12, 2026
References
- advisoryhttp://packetstormsecurity.com/files/157950/WebLogic-Server-Deserialization-Remote-Code-Execution.html
- advisoryhttps://www.oracle.com/security-alerts/cpuapr2020.html
- advisoryhttps://www.zerodayinitiative.com/advisories/ZDI-20-504/
- advisoryhttps://www.zerodayinitiative.com/advisories/ZDI-20-570/
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core).
Affected: WebLogic Server (Oracle) versions 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, >= 10.3.6.0.0. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 30, 2020.
Yes. It was added on Jan 7, 2025 with a federal remediation due date of Jan 28, 2025.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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