CVE-2018-18909: xhEditor 1.2.2 allows XSS via JavaScript code in the SRC attribute of an IFRAME element within the editor's so

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MEDIUM 6.1DOWNGRADE

CVE-2018-18909 is a medium-severity flaw (CVSS 6.1) affecting xheditor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

xhEditor 1.2.2 allows XSS via JavaScript code in the SRC attribute of an IFRAME element within the editor's source-code view.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-11-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: xheditor

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

Am I affected?

Timeline

2018-11-03 16:29 UTCPublished CVE record published
2026-06-17 01:48 UTCUpdated Record last modified

xheditor xheditor DOWNGRADE

Affected: 1.2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2.2 (Debian / Ubuntu)

apt-cache madison xheditor sudo apt install xheditor=<VERSION_BEFORE_1.2.2> sudo apt-mark hold xheditor

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list xheditor sudo dnf downgrade xheditor-<VERSION_BEFORE_1.2.2> sudo dnf versionlock add xheditor

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2018-18909?

xheditor: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-18909 being exploited?

CVE-2018-18909 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-2018-18909 affect?

CVE-2018-18909 affects xheditor. Severity is medium (CVSS 6.1). xhEditor 1.2.2 allows XSS via JavaScript code in the SRC attribute of an IFRAME element within the editor's source-code view.

How urgent is CVE-2018-18909?

Priority 41/100. Public exploit reference

References

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