How severe is CVE-2018-1000854?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2018-1000854 known to be exploited?

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

Vulnerability in Esigate

CVE-2018-1000854

esigate.org esigate version 5.2 and earlier contains a CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in ESI directive with user specified XSLT that can result in Remote Code Execution. This attack appear to be exploitable via Use of another weakness in backend application to reflect ESI directives. This vulnerability appears to have been fixed in 5.3.

EPSS: 0.032 (86.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Esigate
N/a — versions n/a

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

Public proof-of-concept exploits

References

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

Frequently asked questions

What is CVE-2018-1000854?: CVE-2018-1000854 is a critical-severity vulnerability in Esigate, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 9.8/10. Published 2018-12-20.
How severe is CVE-2018-1000854?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-1000854 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.