CVE-2020-4421
IBM WebSphere Application Liberty 19.0.0.5 through 20.0.0.4 could allow an authenticated user...
IBM WebSphere Application Liberty 19.0.0.5 through 20.0.0.4 could allow an authenticated user using openidconnect to spoof another users identify. IBM X-Force ID: 180084.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
IBM WebSphere Application Liberty 19.0.0.5 through 20.0.0.4 could allow an authenticated user using openidconnect to spoof another users identify. IBM X-Force ID: 180084.
- Record
CVE-2020-4421- CVSS 3.0
- 5.0 Medium
CVSS:3.0/A:L/I:L/AV:N/AC:H/S:U/C:L/PR:L/UI:N/RL:O/E:U/RC:C - Updated
- 2026-11-02
EUVDEUVD-2020-25668
IBM WebSphere Application Liberty 19.0.0.5 through 20.0.0.4 could allow an authenticated user using openidconnect to spoof another users identify. IBM X-Force ID: 180084.
- Record
EUVD-2020-25668- CVSS 3.0
- 5.0 Medium
CVSS:3.0/A:L/I:L/AV:N/AC:H/S:U/C:L/PR:L/UI:N/RL:O/E:U/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c453-37mp-9fx2 No score
IBM WebSphere Application Liberty 19.0.0.5 through 20.0.0.4 could allow an authenticated user...
IBM WebSphere Application Liberty 19.0.0.5 through 20.0.0.4 could allow an authenticated user using openidconnect to spoof another users identify. IBM X-Force ID: 180084.
- Record
GHSA-c453-37mp-9fx2- Weakness
- CWE-287
- Updated
- 2026-11-02
NVD
IBM WebSphere Application Liberty 19.0.0.5 through 20.0.0.4 could allow an authenticated user using openidconnect to spoof another users identify. IBM X-Force ID: 180084.
- Record
CVE-2020-4421- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - CVSS 3.0
- 5.0 Medium
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L - CVSS 2.0
- 5.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:N - Weakness
- CWE-290
- 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-2020-4421 is a medium vulnerability (CVSS 5.0) in Ibm Websphere Application Server Liberty, published May 6, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.62%, the 50th percentile. No source names a fixed version.