CVE-2017-18559: The cforms2 plugin before 14.13.3 for WordPress has multiple XSS issues.

Q: How do I fix CVE-2017-18559?

cformsii: upgrade to 14.13.3. Exact commands for each OS are on this page.

Q: Is CVE-2017-18559 being exploited?

CVE-2017-18559 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-2017-18559 affect?

CVE-2017-18559 affects cformsii. Severity is medium (CVSS 6.1). The cforms2 plugin before 14.13.3 for WordPress has multiple XSS issues.

Q: How urgent is CVE-2017-18559?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2017-18559 is a medium-severity flaw (CVSS 6.1) affecting cformsii. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The cforms2 plugin before 14.13.3 for WordPress has multiple XSS issues.

Why this priority

No elevated risk signals yet

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	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-08-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cformsii project

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

Am I affected?

Timeline

2019-08-21 19:15 UTCPublished CVE record published
2026-06-17 01:13 UTCUpdated Record last modified

cformsii project cformsii UPGRADE

Affected: < 14.13.3

Fixed in: 14.13.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 14.13.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cformsii

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-2017-18559?

cformsii: upgrade to 14.13.3. Exact commands for each OS are on this page.

Is CVE-2017-18559 being exploited?

CVE-2017-18559 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-2017-18559 affect?

CVE-2017-18559 affects cformsii. Severity is medium (CVSS 6.1). The cforms2 plugin before 14.13.3 for WordPress has multiple XSS issues.

How urgent is CVE-2017-18559?

Priority 36/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

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References

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