Vulnerability-Lookup

GHSA-XVC3-WFF6-474C

Vulnerability from github – Published: 2026-11-07 06:31 – Updated: 2026-11-07 06:31

Details

The Stop Spammers Classic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'author' POST parameter in versions up to, and including, 2026.6. An unauthenticated POST handled on init stores the attacker-supplied author field (after sanitize_text_field, which does not escape single quotes) into the ss_stop_sp_reg_stats option history. The Log Report admin page then renders that stored value inside a single-quoted JavaScript string within a double-quoted onclick attribute using esc_js(); because esc_js() uses _wp_specialchars with ENT_COMPAT it does not escape single quotes, allowing the stored value to break out of the JS string literal and inject arbitrary JavaScript. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute whenever an administrator with manage_options access clicks the 'Report to SFS' link on an attacker-poisoned log row (the StopForumSpam API key must be configured for that link to be rendered — the field is empty by default). Successful exploitation additionally requires an action by an administrator — the attacker cannot trigger the vulnerability on their own.

Severity

4.7 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-120477"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-11-07T05:18:11Z",
    "severity": "MODERATE"
  },
  "details": "The Stop Spammers Classic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the \u0027author\u0027 POST parameter in versions up to, and including, 2026.6. An unauthenticated POST handled on init stores the attacker-supplied author field (after sanitize_text_field, which does not escape single quotes) into the ss_stop_sp_reg_stats option history. The Log Report admin page then renders that stored value inside a single-quoted JavaScript string within a double-quoted onclick attribute using esc_js(); because esc_js() uses _wp_specialchars with ENT_COMPAT it does not escape single quotes, allowing the stored value to break out of the JS string literal and inject arbitrary JavaScript. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute whenever an administrator with manage_options access clicks the \u0027Report to SFS\u0027 link on an attacker-poisoned log row (the StopForumSpam API key must be configured for that link to be rendered \u2014 the field is empty by default). Successful exploitation additionally requires an action by an administrator \u2014 the attacker cannot trigger the vulnerability on their own.",
  "id": "GHSA-xvc3-wff6-474c",
  "modified": "2026-11-07T06:31:15Z",
  "published": "2026-11-07T06:31:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120477"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/stop-spammer-registrations-plugin/trunk/classes/ss_log_bad.php#L63"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/stop-spammer-registrations-plugin/trunk/settings/ss_reports.php#L165"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/stop-spammer-registrations-plugin/trunk/stop-spammer-registrations-new.php#L323"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/stop-spammer-registrations-plugin/trunk/stop-spammer-registrations-new.php#L600"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3784211%40stop-spammer-registrations-plugin\u0026new=3784211%40stop-spammer-registrations-plugin"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/29fe0bc9-b460-4158-86fc-ad2980cc827a?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-120477 (GCVE-0-2026-120477)

Vulnerability from cvelistv5 – Published: 2026-11-07 04:27 – Updated: 2026-11-07 04:27

Title

Stop Spammers Classic <= 2026.6 - Unauthenticated Stored Cross-Site Scripting via 'author' Parameter

Summary

Severity

4.7 (Medium)


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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation

Assigner

Wordfence CNA under the mitre root

CNA scorecard C 65/100 over 2475 records in the last 180 days details

References

6 references

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

Impacted products

1 product

Vendor	Product	Version
webguyio	Stop Spammers Classic	Affected: 0 , ≤ 2026.6 (semver)

Credits

Mohamed Amgad Khater (mamgad)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Stop Spammers Classic",
          "vendor": "webguyio",
          "versions": [
            {
              "lessThanOrEqual": "2026.6",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Mohamed Amgad Khater (mamgad)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Stop Spammers Classic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the \u0027author\u0027 POST parameter in versions up to, and including, 2026.6. An unauthenticated POST handled on init stores the attacker-supplied author field (after sanitize_text_field, which does not escape single quotes) into the ss_stop_sp_reg_stats option history. The Log Report admin page then renders that stored value inside a single-quoted JavaScript string within a double-quoted onclick attribute using esc_js(); because esc_js() uses _wp_specialchars with ENT_COMPAT it does not escape single quotes, allowing the stored value to break out of the JS string literal and inject arbitrary JavaScript. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute whenever an administrator with manage_options access clicks the \u0027Report to SFS\u0027 link on an attacker-poisoned log row (the StopForumSpam API key must be configured for that link to be rendered \u2014 the field is empty by default). Successful exploitation additionally requires an action by an administrator \u2014 the attacker cannot trigger the vulnerability on their own."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-07T04:27:12.859Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/29fe0bc9-b460-4158-86fc-ad2980cc827a?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/stop-spammer-registrations-plugin/trunk/settings/ss_reports.php#L165"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/stop-spammer-registrations-plugin/trunk/stop-spammer-registrations-new.php#L600"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/stop-spammer-registrations-plugin/trunk/stop-spammer-registrations-new.php#L323"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/stop-spammer-registrations-plugin/trunk/classes/ss_log_bad.php#L63"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3784211%40stop-spammer-registrations-plugin\u0026new=3784211%40stop-spammer-registrations-plugin"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-11-06T15:44:44.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Stop Spammers Classic \u003c= 2026.6 - Unauthenticated Stored Cross-Site Scripting via \u0027author\u0027 Parameter"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-120477",
    "datePublished": "2026-11-07T04:27:12.859Z",
    "dateReserved": "2026-11-02T13:51:14.747Z",
    "dateUpdated": "2026-11-07T04:27:12.859Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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

Sightings and recorded dates, grouped by day · UTC

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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.

Related by attack behaviour

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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