Vulnerability-Lookup

GHSA-W4PH-XFMV-G57Q

Vulnerability from github – Published: 2026-08-21 12:30 – Updated: 2026-08-21 12:30

Details

The Passster WordPress plugin before 4.3.9 does not correctly match its own public endpoint paths when deciding which REST API requests may bypass global password protection, comparing them as an unanchored substring of the request URI rather than against the resolved route, allowing an unauthenticated attacker to read the content of globally password-protected posts and pages.

Severity

5.3 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-17559"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-21T12:16:24Z",
    "severity": "MODERATE"
  },
  "details": "The Passster WordPress plugin before 4.3.9 does not correctly match its own public endpoint paths when deciding which REST API requests may bypass global password protection, comparing them as an unanchored substring of the request URI rather than against the resolved route, allowing an unauthenticated attacker to read the content of globally password-protected posts and pages.",
  "id": "GHSA-w4ph-xfmv-g57q",
  "modified": "2026-08-21T12:30:33Z",
  "published": "2026-08-21T12:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17559"
    },
    {
      "type": "WEB",
      "url": "https://wpscan.com/vulnerability/28a48c1c-e162-4e8a-b450-5568fb3a3fc8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-17559 (GCVE-0-2026-17559)

Vulnerability from cvelistv5 – Published: 2026-08-21 11:40 – Updated: 2026-08-21 12:47

Title

Content Protector (Passster) < 4.3.9 - Unauthenticated Protected Content Disclosure via REST Path Allowlist Bypass

Summary

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 12:47 UTC

CWE

CWE-863 Incorrect Authorization
CWE-863 - Incorrect Authorization

Assigner

WPScan mitre root

References

1 reference

URL	Tags
https://wpscan.com/vulnerability/28a48c1c-e162-4e…	exploitvdb-entrytechnical-description

Impacted products

1 product

Vendor	Product	Version
Unknown	Passster	Affected: 4.3.3 , < 4.3.9 (semver)

Credits

Erwan LR (WPScan) WPScan

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JSON

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{
  "containers": {
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        "metrics": [
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                "id": "CVE-2026-17559",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-21T12:47:08.377343Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        "problemTypes": [
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            "descriptions": [
              {
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                "description": "CWE-863 Incorrect Authorization",
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        "providerMetadata": {
          "dateUpdated": "2026-08-21T12:47:20.891Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://wordpress.org/plugins",
          "defaultStatus": "unaffected",
          "product": "Passster",
          "vendor": "Unknown",
          "versions": [
            {
              "lessThan": "4.3.9",
              "status": "affected",
              "version": "4.3.3",
              "versionType": "semver"
            }
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      "credits": [
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          "lang": "en",
          "type": "finder",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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      "references": [
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          "url": "https://wpscan.com/vulnerability/28a48c1c-e162-4e8a-b450-5568fb3a3fc8/"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "Content Protector (Passster) \u003c 4.3.9 - Unauthenticated Protected Content Disclosure via REST Path Allowlist Bypass",
      "x_generator": {
        "engine": "WPScan CVE Generator"
      }
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  },
  "cveMetadata": {
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    "datePublished": "2026-08-21T11:40:41.735Z",
    "dateReserved": "2026-07-27T13:36:40.825Z",
    "dateUpdated": "2026-08-21T12:47:20.891Z",
    "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.

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.

Action not permitted

GHSA-W4PH-XFMV-G57Q

CVE-2026-17559 (GCVE-0-2026-17559)

Tags

Sightings

Nomenclature