CVE-2021-33501

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

7.91% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 94.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-07-19 11:37Z5 YR AGO

Last updated

2024-08-03 23:50Z2 YR AGO

Reserved

2021-05-21

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

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

Data version

5.1

Document digest

4897dec1b08ab1add960ba2036f38283d1ae859ba1b6f6dcfeabadb9ca09d4ec

• www.overwolf.comhttps://www.overwolf.comx_refsource_MISC
• swordbytes.comhttps://swordbytes.com/blog/security-advisory-overwolf-1-click-remote-code-execution-cve-2021-33501/x_refsource_MISC
• github.comhttps://github.com/swordbytes/Advisories/blob/master/2021/Advisory_CVE-2021-33501.pdfx_refsource_MISC