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Fencer Vulns
high 8.8

CVE-2021-37394 json

In RPCMS v1.8 and below, attackers can interact with API and change variable "role" to "admin" to achieve admin user registration.

published 2021-07-26 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-23963

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

In RPCMS v1.8 and below, attackers can interact with API and change variable "role" to "admin" to achieve admin user registration.

Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% 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 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.0 AV:N/AC:M/Au:S/C:P/I:P/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.