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Fencer Vulns
critical 9.8

CVE-2021-43703 json

An Incorrect Access Control vulnerability exists in zzcms less than or equal to 2019 via admin.php.

published 2021-12-09 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30610

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

An Incorrect Access Control vulnerability exists in zzcms less than or equal to 2019 via admin.php. After disabling JavaScript, you can directly access the administrator console.

Exploit prediction

1.86% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/forget-code/zzcms/issues/1 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/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.