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Vulnerability record · CVE-2021-33501 · published 19 July 2021

CVE-2021-33501: Overwolf cross-site scripting vulnerability

Overwolf · Overwolf

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

9.6 CVSS 3.1 Critical EPSS 7.9% · top 5.5% CWE-79 · Cross-site scripting
9.6CVSS 3.1 base score, v2 9.3
7.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/swordbytes/Advisories/blob/master/2021/Advisory_CVE-2021-33501.pdf ExploitThird Party Advisory
https://swordbytes.com/blog/security-advisory-overwolf-1-click-remote-code-execution-cve-2021-33501/ ExploitVendor Advisory
https://www.overwolf.com Product
https://github.com/swordbytes/Advisories/blob/master/2021/Advisory_CVE-2021-33501.pdf ExploitThird Party Advisory
https://swordbytes.com/blog/security-advisory-overwolf-1-click-remote-code-execution-cve-2021-33501/ ExploitVendor Advisory
https://www.overwolf.com Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-33501), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.