CVE-2018-1000834: runelite version <= runelite-parent-1.4.23 contains a XML External Entity (XXE) vulnerability in Man in the mi

Q: How do I fix CVE-2018-1000834?

runelite: upgrade to newer than 1.4.23. Exact commands for each OS are on this page.

Q: Is CVE-2018-1000834 being exploited?

CVE-2018-1000834 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-2018-1000834 affect?

CVE-2018-1000834 affects runelite. Severity is critical (CVSS 9.0). runelite version <= runelite-parent-1.4.23 contains a XML External Entity (XXE) vulnerability in Man in the middle runscape services call that can result in Disclosure of confidential data, denial of service, SSRF, port scanning.

Q: How urgent is CVE-2018-1000834?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.0REMOTEUPGRADE

CVE-2018-1000834 is a critical-severity flaw (CVSS 9.0) affecting runelite. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

runelite version <= runelite-parent-1.4.23 contains a XML External Entity (XXE) vulnerability in Man in the middle runscape services call that can result in Disclosure of confidential data, denial of service, SSRF, port scanning.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-611
Published	2018-12-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: runelite

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 15:29 UTCPublished CVE record published
2026-06-17 01:33 UTCUpdated Record last modified

runelite runelite UPGRADE

Affected: <= 1.4.23

Fixed in: newer than 1.4.23

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.4.23 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade runelite

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-2018-1000834?

runelite: upgrade to newer than 1.4.23. Exact commands for each OS are on this page.

Is CVE-2018-1000834 being exploited?

CVE-2018-1000834 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-2018-1000834 affect?

CVE-2018-1000834 affects runelite. Severity is critical (CVSS 9.0). runelite version <= runelite-parent-1.4.23 contains a XML External Entity (XXE) vulnerability in Man in the middle runscape services call that can result in Disclosure of confidential data, denial of service, SSRF, port scanning.

How urgent is CVE-2018-1000834?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

References

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