{"id":"CVE-2026-85520","state":"PUBLISHED","title":"Unauthenticated arbitrary file write leading to RCE in gmfeed PrestaShop module","description":"Google Merchant Center Feed (gmfeed) module for PrestaShop is vulnerable to unauthenticated arbitrary file write in the feed.php endpoint. An unauthenticated attacker can send a crafted request that controls the output file name, path, extension, and content through request parameters. Due to the lack of authentication and input validation, the request is processed successfully, allowing an attacker to write and execute arbitrary PHP code, resulting in remote code execution (RCE).\n\n\nThis issue was fixed in version 2.3.9.","publishedAt":"2026-09-29T11:28:55.953Z","updatedAt":"2026-09-29T15:01:21.376Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L","source":"CERT-PL"},"assigner":"CERT-PL","products":["MyPresta Google Merchant Center Feed"],"affected":[{"vendor":"MyPresta","product":"Google Merchant Center Feed","defaultStatus":"unaffected","versions":[{"version":"1.9.1","status":"affected","lessThanOrEqual":"2.3.8","versionType":"semver"}],"collectionURL":"https://mypresta.eu/modules/social-networks/google-merchant-center-feed.html"}],"references":["https://cert.pl/en/posts/2026/09/CVE-2026-85520","https://mypresta.eu/news/google-merchant-center-security-fix-2026.html"],"weaknesses":["CWE-73"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/85xxx/CVE-2026-85520.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-85520","state":"PUBLISHED","datePublished":"2026-09-29T11:28:55.953Z","dateUpdated":"2026-09-29T15:01:21.376Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-09-04T07:37:50.795Z"},"containers":{"cna":{"title":"Unauthenticated arbitrary file write leading to RCE in gmfeed PrestaShop module","descriptions":[{"lang":"en","value":"Google Merchant Center Feed (gmfeed) module for PrestaShop is vulnerable to unauthenticated arbitrary file write in the feed.php endpoint. An unauthenticated attacker can send a crafted request that controls the output file name, path, extension, and content through request parameters. Due to the lack of authentication and input validation, the request is processed successfully, allowing an attacker to write and execute arbitrary PHP code, resulting in remote code execution (RCE).\n\n\nThis issue was fixed in version 2.3.9."}],"affected":[{"vendor":"MyPresta","product":"Google Merchant Center Feed","defaultStatus":"unaffected","versions":[{"version":"1.9.1","status":"affected","lessThanOrEqual":"2.3.8","versionType":"semver"}],"collectionURL":"https://mypresta.eu/modules/social-networks/google-merchant-center-feed.html"}],"references":[{"url":"https://cert.pl/en/posts/2026/09/CVE-2026-85520","tags":["third-party-advisory"]},{"url":"https://mypresta.eu/news/google-merchant-center-security-fix-2026.html","tags":["mitigation"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"LOW","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"LOW","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"CRITICAL","baseScore":9.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-73","lang":"en","description":"CWE-73 External control of file name or path","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-09-29T11:39:09.291Z"},"datePublic":"2026-09-29T00:00:00.000Z","impacts":[{"capecId":"CAPEC-76","descriptions":[{"lang":"en","value":"CAPEC-76 Manipulating Web Input to File System Calls"}]}],"tags":["x_known-exploited-vulnerability"],"credits":[{"lang":"en","value":"Today Group sp. z o.o.","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T15:00:40.099418Z","id":"CVE-2026-85520","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-29T15:01:21.376Z"}}]}}}