CVE-2020-4555

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.76% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 52.5% of scored records. A rank, not a probability.

NVD base score

5.4 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-12-21 17:50Z5 YR AGO

Last updated

2024-09-17 04:29Z1 YR AGO

Reserved

2019-12-30

Assigning CNA

ibm

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

CVSS:3.0/S:U/UI:N/AV:N/PR:L/AC:L/I:L/C:L/A:L/E:U/RL:O/RC:C

Weaknesses

• CWE-384Session FixationCompound

Data version

5.1

Document digest

bee5007e8e6bfa3984c0871830c5f6778cd940a76995c2bdf2729d1460cd263f

• www.ibm.comhttps://www.ibm.com/support/pages/node/6388702x_refsource_CONFIRM
• www.ibm.comhttps://www.ibm.com/support/pages/node/6388744x_refsource_CONFIRM
• www.ibm.comhttps://www.ibm.com/support/pages/node/6388708x_refsource_CONFIRM
• www.ibm.comhttps://www.ibm.com/support/pages/node/6388706x_refsource_CONFIRM
• www.ibm.comhttps://www.ibm.com/support/pages/node/6388704x_refsource_CONFIRM
• www.ibm.comhttps://www.ibm.com/support/pages/node/6388722x_refsource_CONFIRM
• exchange.xforce.ibmcloud.comibm-ftm-cve20204555-session-fixation (183328)https://exchange.xforce.ibmcloud.com/vulnerabilities/183328vdb-entryx_refsource_XF