CVE-2026-103422: XSS (CVSS 7.2)

Description

The AnyComment plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'email' parameter in versions up to, and including, 0.3.6. This is due to insufficient input sanitization on the public /wp-json/anycomment/v1/subscribe REST endpoint and missing output escaping in AnyCommentSubscriptionsTable::column_default(), which returns the stored email verbatim into an HTML <td> when the subscription's user_ID does not resolve to an existing WP_User. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator accesses the AnyComment → Subscriptions admin page.

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CVSS v3.1 Score

7.2

HIGH

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

EPSS — Exploit Prediction

0.0031

Probability of exploitation

0.22%

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-79 Cross-site Scripting (XSS)

References

Other References

https://plugins.trac.wordpress.org/browser/anycomment/tags/0.3.6/includes/Admin/Tables/AnyCommentSubscriptionsTable.php#L107 https://plugins.trac.wordpress.org/browser/anycomment/tags/0.3.6/includes/Models/AnyCommentSubscriptions.php#L311 https://plugins.trac.wordpress.org/browser/anycomment/tags/0.3.6/includes/Rest/AnyCommentRestSubscriptions.php#L124 https://plugins.trac.wordpress.org/browser/anycomment/tags/0.3.6/includes/Rest/AnyCommentRestSubscriptions.php#L59 https://www.wordfence.com/threat-intel/vulnerabilities/id/ce925d1c-2254-49ea-9fcf-e948813b3f2c?source=cve

Frequently Asked Questions

What is CVE-2026-103422? +

The AnyComment plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'email' parameter in versions up to, and including, 0.3.6. This is due to insufficient input sanitization on the public /wp-json/anycomment/v1/subscribe REST endpoint and missing output escaping in AnyCommentSubscriptionsTable::column_default(), which returns the stored email verbatim into an HTML <td> when the subscription's user_ID does not resolve to an existing WP_User. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator accesses the AnyComment → Subscriptions admin page. It has a CVSS v3.1 base score of 7.2 (HIGH).

How severe is CVE-2026-103422? +

CVE-2026-103422 has a CVSS v3.1 score of 7.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0031, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-103422? +

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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