Skip to content
Fencer Intel
critical 9.3

CVE-2021-20791 json

Improper access control vulnerability in RevoWorks Browser 2.1.230 and earlier allows an attacker to bypass access restriction and to excha…

published 5y ago modified 4mo ago also EUVD-2021-8203

cvss
9.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

Improper access control vulnerability in RevoWorks Browser 2.1.230 and earlier allows an attacker to bypass access restriction and to exchange unauthorized files between the local environment and the isolated environment or settings of the web browser via unspecified vectors.

Is CVE-2021-20791 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

0.84% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 9.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/I:P/A:N

Affected products

  • J’s Communication Co., Ltd. RevoWorks Browser

References

Sources

Fencer Intel 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.