Vulnerability-Lookup

GHSA-CMHF-VXJ4-V56X

Vulnerability from github – Published: 2026-09-28 09:30 – Updated: 2026-09-28 09:30

Details

Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs & Accordions (Pro) 2.3.0 - 3.1.0 - Tabs & Accordions Pro accepts a url option for an item and writes it to a generated data-rlta-url attribute. The browser code passes that value to window.open() when the item is activated. Affected versions do not reject browser URL schemes which execute JavaScript. Joomla sees ordinary plugin syntax while filtering the authored article; Tabs & Accordions creates the executable browser behavior later while rendering the article.

Severity

7.5 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-100751"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-28T07:17:19Z",
    "severity": "HIGH"
  },
  "details": "Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs \u0026 Accordions (Pro) 2.3.0 - 3.1.0 - Tabs \u0026 Accordions Pro accepts a url option for an item and writes it to a generated data-rlta-url attribute. The browser code passes that value to window.open() when the item is activated. Affected versions do not reject browser URL schemes which execute JavaScript. Joomla sees ordinary plugin syntax while filtering the authored article; Tabs \u0026 Accordions creates the executable browser behavior later while rendering the article.",
  "id": "GHSA-cmhf-vxj4-v56x",
  "modified": "2026-09-28T09:30:25Z",
  "published": "2026-09-28T09:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100751"
    },
    {
      "type": "WEB",
      "url": "https://www.regularlabs.com"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:N/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-100751 (GCVE-0-2026-100751)

Vulnerability from cvelistv5 – Published: 2026-09-28 06:52 – Updated: 2026-09-30 15:07

Title

Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs & Accordions (Pro) 2.3.0 - 3.1.0

Summary

Severity

7.5 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 11:35 UTC

CWE

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

Assigner

Joomla mitre root Scorecard

References

1 reference

URL	Tags
https://www.regularlabs.com/	product

Impacted products

1 product

Vendor	Product	Version
regularlabs.com	Tabs & Accordions (Free, Pro) extension for Joomla	Affected: 2.3.0-3.1.0

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-100751",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-30T11:35:02.304718Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-30T11:37:01.048Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "plg_system_advancedmodules",
          "product": "Tabs \u0026 Accordions (Free, Pro) extension for Joomla",
          "vendor": "regularlabs.com",
          "versions": [
            {
              "status": "affected",
              "version": "2.3.0-3.1.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs \u0026 Accordions (Pro) 2.3.0 - 3.1.0 - Tabs \u0026 Accordions Pro accepts a url option for an item and writes it to a generated data-rlta-url attribute. The browser code passes that value to window.open() when the item is activated. Affected versions do not reject browser URL schemes which execute JavaScript. Joomla sees ordinary plugin syntax while filtering the authored article; Tabs \u0026 Accordions creates the executable browser behavior later while rendering the article."
            }
          ],
          "value": "Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs \u0026 Accordions (Pro) 2.3.0 - 3.1.0 - Tabs \u0026 Accordions Pro accepts a url option for an item and writes it to a generated data-rlta-url attribute. The browser code passes that value to window.open() when the item is activated. Affected versions do not reject browser URL schemes which execute JavaScript. Joomla sees ordinary plugin syntax while filtering the authored article; Tabs \u0026 Accordions creates the executable browser behavior later while rendering the article."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NO",
            "Recovery": "NOT_DEFINED",
            "Safety": "NEGLIGIBLE",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "format": "CVSS",
          "scenarios": [
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              "lang": "en",
              "value": "GENERAL"
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      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-09-30T15:07:02.147Z",
        "orgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586",
        "shortName": "Joomla"
      },
      "references": [
        {
          "tags": [
            "product"
          ],
          "url": "https://www.regularlabs.com/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs \u0026 Accordions (Pro) 2.3.0 - 3.1.0",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586",
    "assignerShortName": "Joomla",
    "cveId": "CVE-2026-100751",
    "datePublished": "2026-09-28T06:52:13.956Z",
    "dateReserved": "2026-09-26T14:38:32.303Z",
    "dateUpdated": "2026-09-30T15:07:02.147Z",
    "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.

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.

Action not permitted

GHSA-CMHF-VXJ4-V56X

CVE-2026-100751 (GCVE-0-2026-100751)

Tags

Sightings

Nomenclature

Related by attack behaviour