How severe is CVE-2018-1000854?

CVE-2018-1000854 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-1000854 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000854?

CVE-2018-1000854 affects Esigate. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1000854?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-1000854 published?

CVE-2018-1000854 was published on 2018-12-20 and last updated on 2026-06-17.

CVE-2018-1000854

CVE-2018-1000854 is a critical-severity vulnerability in Esigate with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Esigate
Published: 2018-12-20
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2018-1000854?: CVE-2018-1000854 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-1000854 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000854?: CVE-2018-1000854 affects Esigate. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1000854?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-1000854 published?: CVE-2018-1000854 was published on 2018-12-20 and last updated on 2026-06-17.

References

https://github.com/esigate/esigate/issues/209

Affected products (1)

cpe:2.3:a:esigate:esigate:*:*:*:*:*:*:*:*

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