CVE-2019-16525: An XSS issue was discovered in the checklist plugin before 1.1.9 for WordPress

Q: How do I fix CVE-2019-16525?

checklist: upgrade to 1.1.9. Exact commands for each OS are on this page.

Q: Is CVE-2019-16525 being exploited?

CVE-2019-16525 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-2019-16525 affect?

CVE-2019-16525 affects checklist. Severity is medium (CVSS 6.1). An XSS issue was discovered in the checklist plugin before 1.1.9 for WordPress. The fill parameter is not correctly filtered in the checklist-icon.php file, and it is possible to inject JavaScript code.

Q: How urgent is CVE-2019-16525?

Priority 50/100. EPSS top 7%: very likely to be exploited; Public exploit reference

This month

MEDIUM 6.1UPGRADE

CVE-2019-16525 is a medium-severity flaw (CVSS 6.1) affecting checklist. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An XSS issue was discovered in the checklist plugin before 1.1.9 for WordPress. The fill parameter is not correctly filtered in the checklist-icon.php file, and it is possible to inject JavaScript code.

Why this priority

EPSS top 7%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	5.5% (top 7%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-09-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: checklist

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

Am I affected?

Timeline

2019-09-19 20:15 UTCPublished CVE record published
2026-06-17 02:22 UTCUpdated Record last modified

checklist checklist UPGRADE

Affected: < 1.1.9

Fixed in: 1.1.9

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.1.9 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade checklist

Note

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

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 Checklist <1.1.9 - 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-2019-16525?

checklist: upgrade to 1.1.9. Exact commands for each OS are on this page.

Is CVE-2019-16525 being exploited?

CVE-2019-16525 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-2019-16525 affect?

CVE-2019-16525 affects checklist. Severity is medium (CVSS 6.1). An XSS issue was discovered in the checklist plugin before 1.1.9 for WordPress. The fill parameter is not correctly filtered in the checklist-icon.php file, and it is possible to inject JavaScript code.

How urgent is CVE-2019-16525?

Priority 50/100. EPSS top 7%: very likely to be exploited; Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

Related CVEs

CVE-2018-7318 CRITICAL 9.8 DOWNGRADE DOWNGRADE SQL Injection exists in the CheckList 1.1.1 component for Joomla! via the title_search, tag_search, name_searc

References

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