CVE-2021-37393 json
In RPCMS v1.8 and below, the "nickname" variable is not properly sanitized before being displayed on page.
published 2021-07-26 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-23962
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
In RPCMS v1.8 and below, the "nickname" variable is not properly sanitized before being displayed on page. Attacker can use "update password" function to inject XSS payloads into nickname variable, and achieve stored XSS. Users who view the articles published by the injected user will trigger the XSS.
Exploit prediction
0.53% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- gist.github.com https://gist.github.com/victomteng1997/bfa1e0e07dd22f7e0b13256eda79626f referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
gist.github.com
/victomteng1997/bfa1e0e07dd22f7e0b13256eda79626f
exploit, third-party-advisory
-
github.com
/ralap-z/RPCMS/
product
Sources
- CVE List CVE-2021-37393
- NVD CVE-2021-37393
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