CVE-2026-104006 (CVSS 3.7)

Description

The SpeedyCache – Cache, Optimization, Performance plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.4.2 via the 'comment_author_*, comment_author_email_*' parameter. This makes it possible for unauthenticated attackers to extract the full name and email address of returning commenters pre-filled into comment form input fields and persisted as the site-wide cached page by any unauthenticated attacker requesting the same public URL. The read-side handler in advanced-cache.php correctly skips cached delivery for requests carrying comment_author_* cookies, but this check is absent on the write path, meaning the cache poisoning is invisible to the victim commenter yet fully exploitable by any unauthenticated attacker with no cookies.

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CVSS v3.1 Score

3.7

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploit Prediction

0.0026

Probability of exploitation

0.16%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-524 CWE-524

References

Other References

https://plugins.trac.wordpress.org/browser/speedycache/tags/1.4.2/main/advanced-cache.php#L108 https://plugins.trac.wordpress.org/browser/speedycache/tags/1.4.2/main/cache.php#L151 https://plugins.trac.wordpress.org/browser/speedycache/tags/1.4.2/main/cache.php#L214 https://plugins.trac.wordpress.org/browser/speedycache/tags/1.4.2/main/cache.php#L91 https://plugins.trac.wordpress.org/changeset/3734608/speedycache/trunk/main/cache.php https://plugins.trac.wordpress.org/changeset/3734609/speedycache https://www.wordfence.com/threat-intel/vulnerabilities/id/c6b8d5ca-34e2-4d25-9185-7fcee790379d?source=cve

Frequently Asked Questions

What is CVE-2026-104006? +

The SpeedyCache – Cache, Optimization, Performance plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.4.2 via the 'comment_author_*, comment_author_email_*' parameter. This makes it possible for unauthenticated attackers to extract the full name and email address of returning commenters pre-filled into comment form input fields and persisted as the site-wide cached page by any unauthenticated attacker requesting the same public URL. The read-side handler in advanced-cache.php correctly skips cached delivery for requests carrying comment_author_* cookies, but this check is absent on the write path, meaning the cache poisoning is invisible to the victim commenter yet fully exploitable by any unauthenticated attacker with no cookies. It has a CVSS v3.1 base score of 3.7 (LOW).

How severe is CVE-2026-104006? +

CVE-2026-104006 has a CVSS v3.1 score of 3.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0026, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-104006? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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