CVE-2018-20462: An issue was discovered in the JSmol2WP plugin 1.07 for WordPress

Q: How do I fix CVE-2018-20462?

jsmol2wp: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2018-20462 being exploited?

CVE-2018-20462 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-2018-20462 affect?

CVE-2018-20462 affects jsmol2wp. Severity is medium (CVSS 6.1). An issue was discovered in the JSmol2WP plugin 1.07 for WordPress. A cross-site scripting (XSS) vulnerability allows remote attackers to inject arbitrary web script or HTML via the jsmol.php data parameter.

Q: How urgent is CVE-2018-20462?

Priority 49/100. EPSS top 10%: very likely to be exploited; Public exploit reference

This month

MEDIUM 6.1DOWNGRADE

CVE-2018-20462 is a medium-severity flaw (CVSS 6.1) affecting jsmol2wp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the JSmol2WP plugin 1.07 for WordPress. A cross-site scripting (XSS) vulnerability allows remote attackers to inject arbitrary web script or HTML via the jsmol.php data parameter.

Why this priority

EPSS top 10%: very likely to be exploited
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	4.0% (top 10%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-12-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jsmol2wp project

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

Am I affected?

Timeline

2018-12-25 21:29 UTCPublished CVE record published
2026-06-17 01:52 UTCUpdated Record last modified

jsmol2wp project jsmol2wp DOWNGRADE

Affected: 1.07

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.07

1. Check installed version

apt-cache policy jsmol2wp || rpm -q jsmol2wp || jsmol2wp --version

2. No fixed release: DOWNGRADE to a release before 1.07 (Debian / Ubuntu)

apt-cache madison jsmol2wp sudo apt install jsmol2wp=<VERSION_BEFORE_1.07> sudo apt-mark hold jsmol2wp

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

dnf --showduplicates list jsmol2wp sudo dnf downgrade jsmol2wp-<VERSION_BEFORE_1.07> sudo dnf versionlock add jsmol2wp

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: WordPress JSmol2WP <=1.07 - Cross-Site Scripting

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-2018-20462?

jsmol2wp: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-20462 being exploited?

CVE-2018-20462 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-2018-20462 affect?

CVE-2018-20462 affects jsmol2wp. Severity is medium (CVSS 6.1). An issue was discovered in the JSmol2WP plugin 1.07 for WordPress. A cross-site scripting (XSS) vulnerability allows remote attackers to inject arbitrary web script or HTML via the jsmol.php data parameter.

How urgent is CVE-2018-20462?

Priority 49/100. EPSS top 10%: very likely to be exploited; Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

Related CVEs

CVE-2018-20463 HIGH 7.5 DOWNGRADE An issue was discovered in the JSmol2WP plugin 1.07 for WordPress

References

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