Skip to content
Fencer Vulns
critical 9.8

CVE-2020-2555 kev in the critical feed json

Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Caching,CacheStore,Invocation).

published 2020-01-15 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-22348

cvss
9.8
version 3.0, CNA
cisa kev
Exploited
added 2021-11-03
epss
97.1%
EPSS 97.1% chance of exploitation in 30 days, percentile 99.8%
public exploits
3
Metasploit, Exploit-DB

Summary

Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Caching,CacheStore,Invocation). Supported versions that are affected are 3.7.1.0, 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 T3 to compromise Oracle Coherence. Successful attacks of this vulnerability can result in takeover of Oracle Coherence. 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).

Patch / fix

cisa required action Apply updates per vendor instructions.

Timeline

  1. First public exploit (Metasploit exploit/multi/misc/weblogic_deserialize_badattrval)
  2. Published
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
5 y ago
Patch by
2022-05-03 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Oracle, Multiple Products
CISA name
Oracle Multiple Products Remote Code Execution Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

97.12% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/multi/misc/weblogic_deserialize_badattrval WebLogic Server Deserialization RCE - BadAttributeValueExpException metasploit exploit, normal rank, 2020-01-15
  • EDB-48508 WebLogic Server - Deserialization RCE - BadAttributeValueExpException (Metasploit) remote, 2020-05-22
  • EDB-48320 Oracle WebLogic Server 12.2.1.4.0 - Remote Code Execution webapps, 2020-04-14
  • packetstormsecurity.com http://packetstormsecurity.com/files/157054/Oracle-Coherence-Fusion-Middleware-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/157207/Oracle-WebLogic-Server-12.2.1.4.0-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/157795/WebLogic-Server-Deserialization-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Oracle Corporation WebCenter Portal
  • Oracle Corporation Utilities Framework

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.