CVE-2021-20524

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

0.48% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 41.6% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/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

2021-07-15 17:16Z5 YR AGO

Last updated

2024-09-17 03:12Z2 YR AGO

Reserved

2020-12-17

Assigning CNA

ibm

Record state

PUBLISHED

Severity

Medium (CVSS 4.8)

CNA CVSS vector

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

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

778f439419dc2798a2ff5fe09bb521ae03bbe93d77e4425955d632fc2defe16d

• www.ibm.comhttps://www.ibm.com/support/pages/node/6471895x_refsource_CONFIRM
• exchange.xforce.ibmcloud.comibm-sam-cve202120524-xss (198661)https://exchange.xforce.ibmcloud.com/vulnerabilities/198661vdb-entryx_refsource_XF