CVE-2025-0837: The Puzzles theme for WordPress is vulnerable to Stored Cross-Site Scripting via shortcodes in versions up to,

Q: How do I fix CVE-2025-0837?

puzzles: upgrade to newer than 4.2.6. Exact commands for each OS are on this page.

Q: Is CVE-2025-0837 being exploited?

CVE-2025-0837 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-2025-0837 affect?

CVE-2025-0837 affects puzzles. Severity is medium (CVSS 6.4). The Puzzles theme for WordPress is vulnerable to Stored Cross-Site Scripting via shortcodes in versions up to, and including, 4.2.6 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possib

Q: How urgent is CVE-2025-0837?

Priority 27/100. No elevated risk signals yet.

Routine

MEDIUM 6.4UPGRADE

CVE-2025-0837 is a medium-severity flaw (CVSS 6.4) affecting puzzles. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Puzzles theme for WordPress is vulnerable to Stored Cross-Site Scripting via shortcodes in versions up to, and including, 4.2.6 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-02-13
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: themerex

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

Am I affected?

Timeline

2025-02-13 05:15 UTCPublished CVE record published
2026-06-17 08:27 UTCUpdated Record last modified

themerex puzzles UPGRADE

Affected: <= 4.2.6

Fixed in: newer than 4.2.6

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 4.2.6 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade puzzles

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-2025-0837?

puzzles: upgrade to newer than 4.2.6. Exact commands for each OS are on this page.

Is CVE-2025-0837 being exploited?

CVE-2025-0837 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-2025-0837 affect?

CVE-2025-0837 affects puzzles. Severity is medium (CVSS 6.4). The Puzzles theme for WordPress is vulnerable to Stored Cross-Site Scripting via shortcodes in versions up to, and including, 4.2.6 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possib

How urgent is CVE-2025-0837?

Priority 27/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

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References

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