{"api_version":"1","generated_at":"2026-10-03T21:57:23+00:00","cve":"CVE-2026-87091","urls":{"html":"https://cve.report/CVE-2026-87091","api":"https://cve.report/api/cve/CVE-2026-87091.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-87091","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-87091"},"summary":{"title":"Welcart e-Commerce <= 2.12.2 - Unauthenticated Stored Cross-Site Scripting via Settlement Notification Parameters","description":"The Welcart e-Commerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Settlement Notification Parameters in all versions up to, and including, 2.12.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The IPN endpoint accepts the 'rel' and 'option' parameters with no authentication, nonce validation, or signature verification, meaning any unauthenticated attacker can directly submit malicious payloads that are stored and later rendered in the administrator's settlement error log view.","state":"PUBLISHED","assigner":"Wordfence","published_at":"2026-10-03 06:16:44","updated_at":"2026-10-03 16:16:39"},"problem_types":["CWE-79","CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"],"metrics":[{"version":"3.1","source":"security@wordfence.com","type":"Secondary","score":"7.2","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","baseScore":7.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.2","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","data":{"baseScore":7.2,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"}}],"references":[{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/settlement_func.php#L951","name":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/settlement_func.php#L951","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://plugins.trac.wordpress.org/changeset/3690880/usc-e-shop","name":"https://plugins.trac.wordpress.org/changeset/3690880/usc-e-shop","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/settlement_func.php#L906","name":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/settlement_func.php#L906","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/hoock_func.php#L631","name":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/hoock_func.php#L631","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/settlement_func.php#L569","name":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/settlement_func.php#L569","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/hoock_func.php#L631","name":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/hoock_func.php#L631","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/d6046c06-9a77-450f-9cdf-c5239e73cb6b?source=cve","name":"https://www.wordfence.com/threat-intel/vulnerabilities/id/d6046c06-9a77-450f-9cdf-c5239e73cb6b?source=cve","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/settlement_func.php#L951","name":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/settlement_func.php#L951","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://plugins.trac.wordpress.org/changeset/3690880/usc-e-shop/trunk/functions/settlement_func.php","name":"https://plugins.trac.wordpress.org/changeset/3690880/usc-e-shop/trunk/functions/settlement_func.php","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/settlement_func.php#L569","name":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/settlement_func.php#L569","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/settlement_func.php#L906","name":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/settlement_func.php#L906","refsource":"security@wordfence.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-87091","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87091","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"uscnanbu","product":"Welcart e-Commerce","version":"affected 2.12.2 semver","platforms":[]}],"timeline":[{"source":"CNA","time":"2026-09-08T20:19:12.000Z","lang":"en","value":"Vendor Notified"},{"source":"CNA","time":"2026-10-02T17:10:52.000Z","lang":"en","value":"Disclosed"}],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"minhgalaxy","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-87091","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-10-03T15:27:03.790340Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-10-03T15:42:44.079Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Welcart e-Commerce","vendor":"uscnanbu","versions":[{"lessThanOrEqual":"2.12.2","status":"affected","version":"0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"finder","value":"minhgalaxy"}],"descriptions":[{"lang":"en","value":"The Welcart e-Commerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Settlement Notification Parameters in all versions up to, and including, 2.12.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The IPN endpoint accepts the 'rel' and 'option' parameters with no authentication, nonce validation, or signature verification, meaning any unauthenticated attacker can directly submit malicious payloads that are stored and later rendered in the administrator's settlement error log view."}],"metrics":[{"cvssV3_1":{"baseScore":7.2,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-03T05:29:17.586Z","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","shortName":"Wordfence"},"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/d6046c06-9a77-450f-9cdf-c5239e73cb6b?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/settlement_func.php#L906"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/settlement_func.php#L951"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/hoock_func.php#L631"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.2/functions/settlement_func.php#L569"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/settlement_func.php#L906"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/settlement_func.php#L951"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/hoock_func.php#L631"},{"url":"https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.29/functions/settlement_func.php#L569"},{"url":"https://plugins.trac.wordpress.org/changeset/3690880/usc-e-shop"},{"url":"https://plugins.trac.wordpress.org/changeset/3690880/usc-e-shop/trunk/functions/settlement_func.php"}],"timeline":[{"lang":"en","time":"2026-09-08T20:19:12.000Z","value":"Vendor Notified"},{"lang":"en","time":"2026-10-02T17:10:52.000Z","value":"Disclosed"}],"title":"Welcart e-Commerce <= 2.12.2 - Unauthenticated Stored Cross-Site Scripting via Settlement Notification Parameters"}},"cveMetadata":{"assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","assignerShortName":"Wordfence","cveId":"CVE-2026-87091","datePublished":"2026-10-03T05:29:17.586Z","dateReserved":"2026-09-08T20:03:43.422Z","dateUpdated":"2026-10-03T15:42:44.079Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-03 06:16:44","lastModifiedDate":"2026-10-03 16:16:39","problem_types":["CWE-79","CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"],"metrics":{"cvssMetricV31":[{"source":"security@wordfence.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","baseScore":7.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":2.7}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-03T15:27:03.790340Z","id":"CVE-2026-87091","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"87091","Ordinal":"1","Title":"Welcart e-Commerce <= 2.12.2 - Unauthenticated Stored Cross-Site","CVE":"CVE-2026-87091","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"87091","Ordinal":"1","NoteData":"The Welcart e-Commerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Settlement Notification Parameters in all versions up to, and including, 2.12.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The IPN endpoint accepts the 'rel' and 'option' parameters with no authentication, nonce validation, or signature verification, meaning any unauthenticated attacker can directly submit malicious payloads that are stored and later rendered in the administrator's settlement error log view.","Type":"Description","Title":"Welcart e-Commerce <= 2.12.2 - Unauthenticated Stored Cross-Site"}]}}}