Vulnerability-Lookup

CVE-2026-1256 (GCVE-0-2026-1256)

Vulnerability from cvelistv5 – Published: 2026-09-19 08:27 – Updated: 2026-09-19 13:51

Title

YS LeadGen – Popups, Opt-ins & Lead Capture <= 2.1.4 - Missing Authorization to Authenticated (Subscriber+) Stored Cross-Site Scripting via User Input

Summary

The YS LeadGen plugin for WordPress is vulnerable to authorization bypass and Stored Cross-Site Scripting via multiple AJAX endpoints in all versions up to, and including, 2.1.4 due to missing capability checks on popup management actions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to create arbitrary popups and inject malicious JavaScript that executes when the popup is displayed, leading to Stored XSS.

Severity

6.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 2026-09-19 13:17 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 2379 records in the last 180 days details

References

5 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/yslead…
https://plugins.trac.wordpress.org/browser/yslead…
https://plugins.trac.wordpress.org/browser/yslead…
https://plugins.trac.wordpress.org/changeset/3577391

Impacted products

1 product

Vendor	Product	Version	CPE status
ysinnovations	YS LeadGen – Popup Builder, Popup Maker & Form Builder for WordPress \| Lead Generation, Email Marketing, Sales, Conversions, Opt-Ins & Subscribers	Affected: 0 , ≤ 2.1.4 (semver)	guessed

Credits

Athiwat Tiprasaharn (Jitlada) Itthidej Aramsri (Boeing777) Powpy Waris Damkham

Show details on NVD website

JSON

To clipboard

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          }
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                "privilegesRequired": "LOW",
                "scope": "CHANGED",
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            },
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              "type": "finder",
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            },
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}

FKIE_CVE-2026-1256

Vulnerability from fkie_nvd - Published: 2026-09-19 09:16 - Updated: 2026-09-21 13:33

Severity

6.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Summary

References

	URL	Tags
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php#L36
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php#L37
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php#L38
	security@wordfence.com	https://plugins.trac.wordpress.org/changeset/3577391
	security@wordfence.com	https://www.wordfence.com/threat-intel/vulnerabilities/id/b62b8619-4348-4cf7-a572-aa6df20bdc3a?source=cve

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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      "affectedData": [
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          "defaultStatus": "unaffected",
          "product": "YS LeadGen \u2013 Popup Builder, Popup Maker \u0026 Form Builder for WordPress | Lead Generation, Email Marketing, Sales, Conversions, Opt-Ins \u0026 Subscribers",
          "vendor": "ysinnovations",
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            {
              "lessThanOrEqual": "2.1.4",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
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    }
  ],
  "id": "CVE-2026-1256",
  "lastModified": "2026-09-21T13:33:33.387",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
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          "baseScore": 6.4,
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          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
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        "source": "security@wordfence.com",
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    },
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  "sourceIdentifier": "security@wordfence.com",
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}

GHSA-H43H-55XH-WJGC

Vulnerability from github – Published: 2026-09-19 09:32 – Updated: 2026-09-19 09:32

Details

Severity

6.4 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-1256"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-19T09:16:34Z",
    "severity": "MODERATE"
  },
  "details": "The YS LeadGen plugin for WordPress is vulnerable to authorization bypass and Stored Cross-Site Scripting via multiple AJAX endpoints in all versions up to, and including, 2.1.4 due to missing capability checks on popup management actions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to create arbitrary popups and inject malicious JavaScript that executes when the popup is displayed, leading to Stored XSS.",
  "id": "GHSA-h43h-55xh-wjgc",
  "modified": "2026-09-19T09:32:12Z",
  "published": "2026-09-19T09:32:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1256"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php#L36"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php#L37"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php#L38"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3577391"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/b62b8619-4348-4cf7-a572-aa6df20bdc3a?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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.

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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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CVE-2026-1256 (GCVE-0-2026-1256)

FKIE_CVE-2026-1256

GHSA-H43H-55XH-WJGC

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Related by attack behaviour