{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93872", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-18T19:39:42.007Z", "datePublished": "2026-09-18T19:56:37.540Z", "dateUpdated": "2026-09-18T19:56:37.540Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-18T19:56:37.540Z"}, "datePublic": "2026-09-17T00:00:00.000Z", "title": "Cotonti 1.0.0 PHP Object Injection via Comments Plugin Edit Action cb Parameter", "descriptions": [{"lang": "en", "value": "Cotonti 1.0.0 passes the base64-decoded cb parameter to unserialize() without allowed_classes restriction in the comments plugin EditAction. Registered users with comment write permissions can instantiate arbitrary PHP objects and potentially achieve file write or code execution through gadget chains."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Deserialization of Untrusted Data", "cweId": "CWE-502", "type": "CWE"}]}], "affected": [{"vendor": "Cotonti", "product": "Cotonti", "defaultStatus": "unaffected", "packageURL": "pkg:composer/cotonti/cotonti", "versions": [{"version": "1.0.0", "lessThanOrEqual": "1.0.0", "status": "affected", "versionType": "custom"}], "repo": "https://github.com/Cotonti/Cotonti", "programFiles": ["plugins/comments/controllers/actions/EditAction.php", "system/cache.php"]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:cotonti:cotonti_siena:*:*:*:*:*:*:*:*", "versionEndIncluding": "1.0.0", "versionStartIncluding": "1.0.0"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/Cotonti/Cotonti/issues/1894", "tags": ["issue-tracking"]}, {"url": "https://github.com/Cotonti/Cotonti/pull/1897", "tags": ["patch", "issue-tracking"]}, {"url": "https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/comments/controllers/actions/EditAction.php", "tags": ["technical-description"]}, {"url": "https://github.com/Cotonti/Cotonti/blob/1.0.0/system/cache.php", "tags": ["technical-description"]}, {"url": "https://github.com/Cotonti/Cotonti", "tags": ["product"]}, {"name": "VulnCheck Advisory: Cotonti 1.0.0 PHP Object Injection via Comments Plugin Edit Action cb Parameter", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/cotonti-1.0.0-php-object-injection-via-comments-plugin-edit-action-cb-parameter"}], "credits": [{"lang": "en", "value": "Harsh Raj Singhania", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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