CVE-2026-87838

Wava Payment 0.3.1 - 0.3.9 - Unauthenticated Merchant Credential Overwrite via Install Webhook

Medium 6.5

The Wava Payment Plugin WordPress plugin before 0.3.10 does not perform any authorisation, nonce or origin verification on one of its public REST endpoints, allowing unauthenticated attackers to overwrite the stored credential that identifies the merchant account the store's payments are created against, to force the integration into a verified state the site owner never completed, and to remove the payment method from the store's checkout.

Assigner
WPScan
Published
2026-10-21
Updated
2026-10-21
Reserved
2026-09-09

Scores

SourceCVSSScoreSeverityVector
CISA-ADP3.16.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Weaknesses

Affected

VendorProductVersions
Unknown Wava Payment Plugin 0.3.1 to < 0.3.10 (affected)
others: unaffected

References

Full CVE JSON record (5.2)

API · GitHub · cve.org

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      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 6.5,
              "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:L",
              "version": "3.1"
            }
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          {
            "other": {
              "content": {
                "id": "CVE-2026-87838",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-21T10:15:33.993815Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "product": "Wava Payment Plugin",
          "vendor": "Unknown",
          "versions": [
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              "status": "affected",
              "version": "0.3.1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Pablo Gonz\u00e1lez P\u00e9rez"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Francisco Jos\u00e9 Ram\u00edrez Vicente and I\u00f1igo S\u00e1nchez Enciso"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "WPScan"
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      "descriptions": [
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          "lang": "en",
          "value": "The Wava Payment Plugin WordPress plugin before 0.3.10 does not perform any authorisation, nonce or origin verification on one of its public REST endpoints, allowing unauthenticated attackers to overwrite the stored credential that identifies the merchant account the store\u0027s payments are created against, to force the integration into a verified state the site owner never completed, and to remove the payment method from the store\u0027s checkout."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-862 Missing Authorization",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-10-21T06:00:25.381Z",
        "orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
        "shortName": "WPScan"
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      "references": [
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          "tags": [
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          "url": "https://wpscan.com/vulnerability/96f247d7-3007-4728-9cd7-0ea52c96edb3/"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Wava Payment 0.3.1 - 0.3.9 - Unauthenticated Merchant Credential Overwrite via Install Webhook",
      "x_generator": {
        "engine": "WPScan CVE Generator"
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    "datePublished": "2026-10-21T06:00:25.381Z",
    "dateReserved": "2026-09-09T11:21:12.222Z",
    "dateUpdated": "2026-10-21T10:35:01.578Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
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