XSS in Overwolf

CVE-2021-33501

Overwolf Client 0.169.0.22 allows XSS, with resultant Remote Code Execution, via an overwolfstore:// URL.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.079 (94.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Overwolf — versions 0.169.0.22
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

cve@mitre.org (Product, x_refsource_MISC)
cve@mitre.org (Exploit, x_refsource_MISC, Vendor Advisory)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-33501?: CVE-2021-33501 is a critical-severity vulnerability in Overwolf, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2021-07-19.
How severe is CVE-2021-33501?: Critical severity. CVSS v3 base score is 9.6 out of 10.
Is CVE-2021-33501 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.