CVE-2025-5559: The TimeZoneCalculator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'tim

Q: How do I fix CVE-2025-5559?

timezonecalculator: upgrade to newer than 3.37. Exact commands for each OS are on this page.

Q: Is CVE-2025-5559 being exploited?

CVE-2025-5559 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-2025-5559 affect?

CVE-2025-5559 affects timezonecalculator. Severity is medium (CVSS 6.4). The TimeZoneCalculator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'timezonecalculator_output' shortcode in all versions up to, and including, 3.37 due to insufficient input sanitization and output esc

Q: How urgent is CVE-2025-5559?

Priority 25/100. No elevated risk signals yet.

Routine

MEDIUM 6.4UPGRADE

CVE-2025-5559 is a medium-severity flaw (CVSS 6.4) affecting timezonecalculator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The TimeZoneCalculator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'timezonecalculator_output' shortcode in all versions up to, and including, 3.37 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesse

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-06-26
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: bernhard-riedl

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

Am I affected?

Timeline

2025-06-26 02:15 UTCPublished CVE record published
2026-06-17 09:48 UTCUpdated Record last modified

bernhard-riedl timezonecalculator UPGRADE

Affected: <= 3.37

Fixed in: newer than 3.37

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.37 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade timezonecalculator

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-2025-5559?

timezonecalculator: upgrade to newer than 3.37. Exact commands for each OS are on this page.

Is CVE-2025-5559 being exploited?

CVE-2025-5559 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-2025-5559 affect?

CVE-2025-5559 affects timezonecalculator. Severity is medium (CVSS 6.4). The TimeZoneCalculator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'timezonecalculator_output' shortcode in all versions up to, and including, 3.37 due to insufficient input sanitization and output esc

How urgent is CVE-2025-5559?

Priority 25/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

References

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