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Fencer Vulns
medium 5.3

CVE-2021-22409 json

There is a denial of service vulnerability in some versions of ManageOne.

published 2021-05-20 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9555

cvss
5.3
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 42%
public exploits
0
none known

Summary

There is a denial of service vulnerability in some versions of ManageOne. There is a logic error in the implementation of a function of a module. When the service pressure is heavy, there is a low probability that an exception may occur. Successful exploit may cause some services abnormal.

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:N/A:P

Affected products

  • n/a ManageOne

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.