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Fencer Vulns
medium 4.3

CVE-2021-27557 json

A cross-site request forgery (CSRF) vulnerability in the Cron job tab in EasyCorp ZenTao 12.5.3 allows attackers to update the fields of a…

published 2021-08-31 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-14308

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

A cross-site request forgery (CSRF) vulnerability in the Cron job tab in EasyCorp ZenTao 12.5.3 allows attackers to update the fields of a Cron job.

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • privasec.com https://privasec.com/blog/zentao-cms-a-monkeys-journey-to-priv-esc-remote-code-execution/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-352 Cross-Site Request Forgery

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.