Vulnerability-Lookup

CVE-2026-85190 (GCVE-0-2026-85190)

Vulnerability from cvelistv5 – Published: 2026-09-14 06:18 – Updated: 2026-09-15 04:46

Title

Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla < 5.0.5

Summary

Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla < 5.0.5 - Quick Index inserts configurable class values into generated HTML without escaping them for an HTML attribute. A crafted value can close the intended class attribute and introduce a new attribute. Joomla's content filter cannot reliably prevent this because Quick Index creates the executable HTML after the authored plugin syntax was filtered.

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 2026-09-14 11:32 UTC

CWE

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

Assigner

Joomla mitre root

References

1 reference

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

Impacted products

1 product

Vendor	Product	Version	CPE status
regularlabs.com	Quick Index (Free, Pro) extension for Joomla	Affected: 1.0.0-5.0.4	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-85190

Vulnerability from fkie_nvd - Published: 2026-09-14 07:17 - Updated: 2026-09-16 19:28

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

Summary

References

	URL	Tags
	security@joomla.org	https://www.regularlabs.com/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "plg_system_quickindex",
          "product": "Quick Index (Free, Pro) extension for Joomla",
          "vendor": "regularlabs.com",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0-5.0.4"
            }
          ]
        }
      ],
      "source": "security@joomla.org"
    }
  ],
  "cveTags": [],
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    {
      "lang": "en",
      "value": "Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla \u003c 5.0.5 - Quick Index inserts configurable class values into generated HTML without escaping them for an HTML attribute. A crafted value can close the intended class attribute and introduce a new attribute. Joomla\u0027s content filter cannot reliably prevent this because Quick Index creates the executable HTML after the authored plugin syntax was filtered."
    }
  ],
  "id": "CVE-2026-85190",
  "lastModified": "2026-09-16T19:28:06.713",
  "metrics": {
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      {
        "cvssData": {
          "Automatable": "NO",
          "Recovery": "NOT_DEFINED",
          "Safety": "NEGLIGIBLE",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
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GHSA-2722-5GXQ-8J64

Vulnerability from github – Published: 2026-09-14 09:31 – Updated: 2026-09-14 09:31

Details

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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-85190"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-14T07:17:22Z",
    "severity": "HIGH"
  },
  "details": "Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla \u003c 5.0.5 - Quick Index inserts configurable class values into generated HTML without escaping them for an HTML attribute. A crafted value can close the intended class attribute and introduce a new attribute. Joomla\u0027s content filter cannot reliably prevent this because Quick Index creates the executable HTML after the authored plugin syntax was filtered.",
  "id": "GHSA-2722-5gxq-8j64",
  "modified": "2026-09-14T09:31:02Z",
  "published": "2026-09-14T09:31:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85190"
    },
    {
      "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"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

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

CVE-2026-85190 (GCVE-0-2026-85190)

FKIE_CVE-2026-85190

GHSA-2722-5GXQ-8J64

Tags

Sightings

Nomenclature

Related by attack behaviour