What is CVE-2021-27556?

CVE-2021-27556 is a high-severity vulnerability in Easycorp Zentao, classified under OS Command Injection. CVSS score: 7.2/10. Published 2021-08-31.

How severe is CVE-2021-27556?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2021-27556 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Easycorp Zentao

CVE-2021-27556

The Cron job tab in EasyCorp ZenTao 12.5.3 allows remote attackers (who have admin access) to execute arbitrary code by setting the type parameter to System.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.040 (89.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Easycorp Zentao — versions 12.5.3
N/a — versions n/a

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

n0-traces/cve_

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-27556?: CVE-2021-27556 is a high-severity vulnerability in Easycorp Zentao, classified under OS Command Injection. CVSS score: 7.2/10. Published 2021-08-31.
How severe is CVE-2021-27556?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2021-27556 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.