Vulnerability-Lookup

CVE-2026-16990 (GCVE-0-2026-16990)

Vulnerability from cvelistv5 – Published: 2026-08-12 11:24 – Updated: 2026-08-12 12:10

Title

Payment Button for PayPal <= 1.2.3.44 - Unauthenticated Payment Price Manipulation

Summary

The Payment Button for PayPal WordPress plugin through 1.2.3.44 does not enforce the merchant-configured price server-side and trusts a client-supplied payment amount, allowing unauthenticated attackers to create a real PayPal order against the merchant for an arbitrary lower amount.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 12:10 UTC

CWE

CWE-602 Client-Side Enforcement of Server-Side Security

Assigner

WPScan

References

1 reference

URL	Tags
https://wpscan.com/vulnerability/97c08603-c407-43…	exploitvdb-entrytechnical-description

Impacted products

1 product

Vendor	Product	Version
Unknown	Payment Button for PayPal	Affected: 0 , ≤ 1.2.3.44 (semver)

Credits

Muni Nitish Kumar Yaddala WPScan

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-16990

Vulnerability from fkie_nvd - Published: 2026-08-12 12:17 - Updated: 2026-08-12 13:17

Severity

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

Summary

References

	URL	Tags
	contact@wpscan.com	https://wpscan.com/vulnerability/97c08603-c407-43b2-ab2c-e39f85e89ebe/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://wordpress.org/plugins",
          "defaultStatus": "unknown",
          "product": "Payment Button for PayPal",
          "vendor": "Unknown",
          "versions": [
            {
              "lessThanOrEqual": "1.2.3.44",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "contact@wpscan.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Payment Button for PayPal WordPress plugin through 1.2.3.44 does not enforce the merchant-configured price server-side and trusts a client-supplied payment amount, allowing unauthenticated attackers to create a real PayPal order against the merchant for an arbitrary lower amount."
    }
  ],
  "id": "CVE-2026-16990",
  "lastModified": "2026-08-12T13:17:20.017",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "contact@wpscan.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
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            },
            {
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            },
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          "timestamp": "2026-08-12T12:10:06.145270Z",
          "version": "2.0.3"
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  "references": [
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      "source": "contact@wpscan.com",
      "url": "https://wpscan.com/vulnerability/97c08603-c407-43b2-ab2c-e39f85e89ebe/"
    }
  ],
  "sourceIdentifier": "contact@wpscan.com",
  "vulnStatus": "Received"
}

GHSA-4H7V-8QRM-X2JJ

Vulnerability from github – Published: 2026-08-12 12:32 – Updated: 2026-08-12 12:32

Details

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-16990"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-12T12:17:47Z",
    "severity": "MODERATE"
  },
  "details": "The Payment Button for PayPal WordPress plugin through 1.2.3.44 does not enforce the merchant-configured price server-side and trusts a client-supplied payment amount, allowing unauthenticated attackers to create a real PayPal order against the merchant for an arbitrary lower amount.",
  "id": "GHSA-4h7v-8qrm-x2jj",
  "modified": "2026-08-12T12:32:54Z",
  "published": "2026-08-12T12:32:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16990"
    },
    {
      "type": "WEB",
      "url": "https://wpscan.com/vulnerability/97c08603-c407-43b2-ab2c-e39f85e89ebe"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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.

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

CVE-2026-16990 (GCVE-0-2026-16990)

FKIE_CVE-2026-16990

GHSA-4H7V-8QRM-X2JJ

Tags

Sightings

Nomenclature