CVE-2018-1000854: esigate.org esigate version 5.2 and earlier contains a CWE-74: Improper Neutralization of Special Elements in

Q: How do I fix CVE-2018-1000854?

esigate: upgrade to newer than 5.2. Exact commands for each OS are on this page.

Q: Is CVE-2018-1000854 being exploited?

CVE-2018-1000854 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-1000854 affect?

CVE-2018-1000854 affects esigate. Severity is critical (CVSS 9.8). 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 Rem

Q: How urgent is CVE-2018-1000854?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2018-1000854 is a critical-severity flaw (CVSS 9.8) affecting esigate. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Weakness	CWE-74
Published	2018-12-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: esigate

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-12-20 17:29 UTCPublished CVE record published
2026-06-17 01:33 UTCUpdated Record last modified

esigate esigate UPGRADE

Affected: <= 5.2

Fixed in: newer than 5.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy esigate || rpm -q esigate || esigate --version

2. UPGRADE to newer than 5.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade esigate

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade esigate

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-1000854?

esigate: upgrade to newer than 5.2. Exact commands for each OS are on this page.

Is CVE-2018-1000854 being exploited?

CVE-2018-1000854 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-1000854 affect?

CVE-2018-1000854 affects esigate. Severity is critical (CVSS 9.8). 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 Rem

How urgent is CVE-2018-1000854?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

References

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