CVE-2026-19985Relevanssi <= 4.28.1 - Reflected Cross-Site Scripting
Updated under an hour ago ()
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It affects comesio Relevanssi – A Better Search. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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The Relevanssi – A Better Search plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 4.28.1 via the 's', 'post_types', and 'orderby' request parameters. This is due to insufficient input sanitization and output escaping in the relevanssi_debug_array() function in lib/debug.php, which dumps user-supplied query variables through print_r() inside a <pre> block without HTML escaping. The debug path is enabled by supplying the relevanssi_debug=on request parameter when the administrator has previously enabled the 'Debugging mode' setting; the gate itself is a configuration check with no capability, nonce, or logged-in check (the vendor explicitly suppresses nonce verification on that line). This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a specially crafted link.
- CVSS
- 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Sep 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
comesio Relevanssi – A Better Search comesio:relevanssi_a_better_search (from the name) | through 4.28.1 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/d07fe28c-f76e-42b2-b894-be316004235a?source=cve
- https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/search.php#L132
- https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/search.php#L143
- https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/debug.php#L68
- https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/search.php#L132
- https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/search.php#L143
- https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/debug.php#L27
- https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/search.php#L562
- https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/debug.php#L68
- https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/debug.php#L27
- https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/search.php#L562
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3650355%40relevanssi%2Ftrunk&old=3529670%40relevanssi%2Ftrunk&sfp_email=&sfph_mail=
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.