Vulnerability-Lookup

GHSA-342H-68MM-3PFR

Vulnerability from github – Published: 2026-09-11 06:31 – Updated: 2026-09-11 06:31

Details

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.

Severity

6.1 (Medium)


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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-19985"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T04:17:34Z",
    "severity": "MODERATE"
  },
  "details": "The Relevanssi \u2013 A Better Search plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 4.28.1 via the \u0027s\u0027, \u0027post_types\u0027, and \u0027orderby\u0027 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 \u003cpre\u003e block without HTML escaping. The debug path is enabled by supplying the relevanssi_debug=on request parameter when the administrator has previously enabled the \u0027Debugging mode\u0027 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.",
  "id": "GHSA-342h-68mm-3pfr",
  "modified": "2026-09-11T06:31:13Z",
  "published": "2026-09-11T06:31:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19985"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/debug.php#L27"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/debug.php#L68"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/search.php#L132"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/search.php#L143"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/search.php#L562"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/debug.php#L27"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/debug.php#L68"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/search.php#L132"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/search.php#L143"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/search.php#L562"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026new=3650355%40relevanssi%2Ftrunk\u0026old=3529670%40relevanssi%2Ftrunk\u0026sfp_email=\u0026sfph_mail="
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/d07fe28c-f76e-42b2-b894-be316004235a?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-19985 (GCVE-0-2026-19985)

Vulnerability from cvelistv5 – Published: 2026-09-11 03:39 – Updated: 2026-09-11 14:10

Title

Relevanssi <= 4.28.1 - Reflected Cross-Site Scripting

Summary

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.

Severity

6.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-11 14:09 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

Wordfence CNA under the mitre root

CNA scorecard C 65/100 over 2374 records in the last 180 days details

References

12 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/releva…
https://plugins.trac.wordpress.org/browser/releva…
https://plugins.trac.wordpress.org/browser/releva…
https://plugins.trac.wordpress.org/browser/releva…
https://plugins.trac.wordpress.org/browser/releva…
https://plugins.trac.wordpress.org/browser/releva…
https://plugins.trac.wordpress.org/browser/releva…
https://plugins.trac.wordpress.org/browser/releva…
https://plugins.trac.wordpress.org/browser/releva…
https://plugins.trac.wordpress.org/browser/releva…
https://plugins.trac.wordpress.org/changeset?sfp_…

Impacted products

1 product

Vendor	Product	Version
comesio	Relevanssi – A Better Search	Affected: 0 , ≤ 4.28.1 (semver)

Credits

Mutantgun

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-19985",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-11T14:09:50.573564Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-11T14:10:13.313Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Relevanssi \u2013 A Better Search",
          "vendor": "comesio",
          "versions": [
            {
              "lessThanOrEqual": "4.28.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Mutantgun"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Relevanssi \u2013 A Better Search plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 4.28.1 via the \u0027s\u0027, \u0027post_types\u0027, and \u0027orderby\u0027 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 \u003cpre\u003e block without HTML escaping. The debug path is enabled by supplying the relevanssi_debug=on request parameter when the administrator has previously enabled the \u0027Debugging mode\u0027 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
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        {
          "descriptions": [
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              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-09-11T03:39:38.495Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/d07fe28c-f76e-42b2-b894-be316004235a?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/search.php#L132"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/search.php#L143"
        },
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          "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/debug.php#L68"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/search.php#L132"
        },
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          "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/search.php#L143"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/debug.php#L27"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.1/lib/search.php#L562"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/debug.php#L68"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/debug.php#L27"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.27.2/lib/search.php#L562"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026new=3650355%40relevanssi%2Ftrunk\u0026old=3529670%40relevanssi%2Ftrunk\u0026sfp_email=\u0026sfph_mail="
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-08-16T14:08:59.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-09-10T14:41:38.000Z",
          "value": "Disclosed"
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      "title": "Relevanssi \u003c= 4.28.1 - Reflected Cross-Site Scripting"
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    "dateReserved": "2026-08-16T13:53:20.548Z",
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    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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