{"api_version":"1","generated_at":"2026-06-20T20:33:19+00:00","cve":"CVE-2023-41330","urls":{"html":"https://cve.report/CVE-2023-41330","api":"https://cve.report/api/cve/CVE-2023-41330.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-41330","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-41330"},"summary":{"title":"CVE-2023-41330","description":"knplabs/knp-snappy is a PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page.\n## Issue\n\nOn March 17th the vulnerability CVE-2023-28115 was disclosed, allowing an attacker to gain remote code execution through PHAR deserialization. Version 1.4.2 added a check `if (\\strpos($filename, 'phar://') === 0)` in the `prepareOutput` function to resolve this CVE, however if the user is able to control the second parameter of the `generateFromHtml()` function of Snappy, it will then be passed as the `$filename` parameter in the `prepareOutput()` function. In the original vulnerability, a file name with a `phar://` wrapper could be sent to the `fileExists()` function, equivalent to the `file_exists()` PHP function. This allowed users to trigger a deserialization on arbitrary PHAR files. To fix this issue, the string is now passed to the `strpos()` function and if it starts with `phar://`, an exception is raised. However, PHP wrappers being case insensitive, this patch can be bypassed using `PHAR://` instead of `phar://`. A successful exploitation of this vulnerability allows executing arbitrary code and accessing the underlying filesystem. The attacker must be able to upload a file and the server must be running a PHP version prior to 8. This issue has been addressed in commit `d3b742d61a` which has been included in version 1.4.3. Users are advised to upgrade. Users unable to upgrade should ensure that only trusted users may submit data to the `AbstractGenerator->generate(...)` function.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2023-09-06 18:15:00","updated_at":"2023-09-12 20:42:00"},"problem_types":["CWE-502"],"metrics":[],"references":[{"url":"https://github.com/KnpLabs/snappy/security/advisories/GHSA-92rv-4j2h-8mjj","name":"https://github.com/KnpLabs/snappy/security/advisories/GHSA-92rv-4j2h-8mjj","refsource":"MISC","tags":[],"title":"PHAR deserialization (CVE-2023-28115 patch bypass) · Advisory · KnpLabs/snappy · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/KnpLabs/snappy/security/advisories/GHSA-gq6w-q6wh-jggc","name":"https://github.com/KnpLabs/snappy/security/advisories/GHSA-gq6w-q6wh-jggc","refsource":"MISC","tags":[],"title":"PHAR deserialization allowing remote code execution · Advisory · KnpLabs/snappy · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/KnpLabs/snappy/commit/d3b742d61a68bf93866032c2c0a7f1486128b67e","name":"https://github.com/KnpLabs/snappy/commit/d3b742d61a68bf93866032c2c0a7f1486128b67e","refsource":"MISC","tags":[],"title":"Merge pull request #488 from KnpLabs/fix/security-advisory-GHSA-92rv-… · KnpLabs/snappy@d3b742d · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-41330","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-41330","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"41330","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"knplabs","cpe5":"snappy","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2023-41330","ASSIGNER":"security-advisories@github.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"knplabs/knp-snappy is a PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page.\n## Issue\n\nOn March 17th the vulnerability CVE-2023-28115 was disclosed, allowing an attacker to gain remote code execution through PHAR deserialization. Version 1.4.2 added a check `if (\\strpos($filename, 'phar://') === 0)` in the `prepareOutput` function to resolve this CVE, however if the user is able to control the second parameter of the `generateFromHtml()` function of Snappy, it will then be passed as the `$filename` parameter in the `prepareOutput()` function. In the original vulnerability, a file name with a `phar://` wrapper could be sent to the `fileExists()` function, equivalent to the `file_exists()` PHP function. This allowed users to trigger a deserialization on arbitrary PHAR files. To fix this issue, the string is now passed to the `strpos()` function and if it starts with `phar://`, an exception is raised. However, PHP wrappers being case insensitive, this patch can be bypassed using `PHAR://` instead of `phar://`. A successful exploitation of this vulnerability allows executing arbitrary code and accessing the underlying filesystem. The attacker must be able to upload a file and the server must be running a PHP version prior to 8. This issue has been addressed in commit `d3b742d61a` which has been included in version 1.4.3. Users are advised to upgrade. Users unable to upgrade should ensure that only trusted users may submit data to the `AbstractGenerator->generate(...)` function.\n"}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-502: Deserialization of Untrusted Data","cweId":"CWE-502"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"KnpLabs","product":{"product_data":[{"product_name":"snappy","version":{"version_data":[{"version_affected":"=","version_value":"< 1.4.3"}]}}]}}]}},"references":{"reference_data":[{"url":"https://github.com/KnpLabs/snappy/security/advisories/GHSA-92rv-4j2h-8mjj","refsource":"MISC","name":"https://github.com/KnpLabs/snappy/security/advisories/GHSA-92rv-4j2h-8mjj"},{"url":"https://github.com/KnpLabs/snappy/security/advisories/GHSA-gq6w-q6wh-jggc","refsource":"MISC","name":"https://github.com/KnpLabs/snappy/security/advisories/GHSA-gq6w-q6wh-jggc"},{"url":"https://github.com/KnpLabs/snappy/commit/d3b742d61a68bf93866032c2c0a7f1486128b67e","refsource":"MISC","name":"https://github.com/KnpLabs/snappy/commit/d3b742d61a68bf93866032c2c0a7f1486128b67e"}]},"source":{"advisory":"GHSA-92rv-4j2h-8mjj","discovery":"UNKNOWN"},"impact":{"cvss":[{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}]}},"nvd":{"publishedDate":"2023-09-06 18:15:00","lastModifiedDate":"2023-09-12 20:42:00","problem_types":["CWE-502"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"},"exploitabilityScore":3.9,"impactScore":5.9}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:knplabs:snappy:*:*:*:*:*:*:*:*","versionEndExcluding":"1.4.3","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}