CVE-2021-33501 json
Overwolf Client 0.169.0.22 allows XSS, with resultant Remote Code Execution, via an overwolfstore:// URL.
published 2021-07-19 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-20202
- cvss
- 9.6
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 7.9%
- EPSS 7.9% chance of exploitation in 30 days, percentile 94%
- public exploits
- 0
- none known
Summary
Overwolf Client 0.169.0.22 allows XSS, with resultant Remote Code Execution, via an overwolfstore:// URL.
Exploit prediction
7.91% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- swordbytes.com https://swordbytes.com/blog/security-advisory-overwolf-1-click-remote-code-execution-cve-2021-33501/ referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/swordbytes/Advisories/blob/master/2021/Advisory_CVE-2021-33501.pdf referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
swordbytes.com
/blog/security-advisory-overwolf-1-click-remote-code-execution-cve-2021-33501/
exploit, vendor-advisory
-
github.com
/swordbytes/Advisories/blob/master/2021/Advisory_CVE-2021-33501.pdf
exploit, third-party-advisory
-
overwolf.com
product
Sources
- CVE List CVE-2021-33501
- NVD CVE-2021-33501
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