CVE-2014-4571: Multiple cross-site scripting (XSS) vulnerabilities in vncal.js.php in the VN-Calendar plugin 1.0 and earlier

Q: How do I fix CVE-2014-4571?

vn-calendar: upgrade to newer than 1.0. Exact commands for each OS are on this page.

Q: Is CVE-2014-4571 being exploited?

CVE-2014-4571 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-2014-4571 affect?

CVE-2014-4571 affects vn-calendar. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in vncal.js.php in the VN-Calendar plugin 1.0 and earlier for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) fs or (2) w parameter.

Q: How urgent is CVE-2014-4571?

Priority 39/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2014-4571 is a medium-severity flaw (CVSS 4.3) affecting vn-calendar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in vncal.js.php in the VN-Calendar plugin 1.0 and earlier for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) fs or (2) w parameter.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-79
Published	2014-07-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: vn-calendar project

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

Am I affected?

Timeline

2014-07-02 20:55 UTCPublished CVE record published
2026-06-17 00:10 UTCUpdated Record last modified

vn-calendar project vn-calendar UPGRADE

Affected: <= 1.0

Fixed in: newer than 1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy vn-calendar || rpm -q vn-calendar || vn-calendar --version

2. UPGRADE to newer than 1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vn-calendar

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vn-calendar

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-2014-4571?

vn-calendar: upgrade to newer than 1.0. Exact commands for each OS are on this page.

Is CVE-2014-4571 being exploited?

CVE-2014-4571 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-2014-4571 affect?

CVE-2014-4571 affects vn-calendar. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in vncal.js.php in the VN-Calendar plugin 1.0 and earlier for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) fs or (2) w parameter.

How urgent is CVE-2014-4571?

Priority 39/100. Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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