{"id":"CVE-2020-26282","aliases":["EUVD-2020-1509","GHSA-wmfg-55f9-j8hq"],"status":"published","title":"Template Injection in BrowserUp Proxy","description":"BrowserUp Proxy allows you to manipulate HTTP requests and responses, capture HTTP content, and export performance data as a HAR file. BrowserUp Proxy works well as a standalone proxy server, but it is especially useful when embedded in Selenium tests. A Server-Side Template Injection was identified in BrowserUp Proxy enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. This has been patched in version 2.1.2.","severity":{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.04829,"percentile":0.921,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-74"],"published":"2020-12-24T20:45:18Z","modified":"2026-10-20T14:05:16Z","fixes":[{"ecosystem":"Maven","package":"com.browserup:browserup-proxy","fixed_in":["2.1.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"com.browserup:browserup-proxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.2"}]}]},{"source":"osv","ecosystem":"Maven","package":"com.browserup:browserup-proxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.2"}]}],"versions":["1.1.0","1.2.0","1.2.1","2.0.0","2.0.1","2.1.0","2.1.1"]}],"products":[{"vendor":"browserup","product":"browserup-proxy"},{"vendor":"browserup","product":"browserup_proxy"}],"references":[{"url":"https://github.com/browserup/browserup-proxy/security/advisories/GHSA-wmfg-55f9-j8hq","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://securitylab.github.com/research/bean-validation-RCE","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/browserup/browserup-proxy/releases/tag/v2.1.2","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/browserup/browserup-proxy/commit/4b38e7a3e20917e5c3329d0d4e9590bed9d578ab","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26282","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-wmfg-55f9-j8hq"}],"sources":{"cve":[{"id":"CVE-2020-26282","title":"Template Injection in BrowserUp Proxy","description":"BrowserUp Proxy allows you to manipulate HTTP requests and responses, capture HTTP content, and export performance data as a HAR file. BrowserUp Proxy works well as a standalone proxy server, but it is especially useful when embedded in Selenium tests. A Server-Side Template Injection was identified in BrowserUp Proxy enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. This has been patched in version 2.1.2.","status":"published","published":"2020-12-24T20:45:18Z","modified":"2024-08-04T15:56:04.075Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical","assessor":"cna"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:35:45.763329Z"}],"euvd":[{"id":"EUVD-2020-1509","description":"BrowserUp Proxy allows you to manipulate HTTP requests and responses, capture HTTP content, and export performance data as a HAR file. BrowserUp Proxy works well as a standalone proxy server, but it is especially useful when embedded in Selenium tests. A Server-Side Template Injection was identified in BrowserUp Proxy enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. This has been patched in version 2.1.2.","status":"published","published":"2020-12-24T20:45:18Z","modified":"2024-08-04T15:56:04Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-03T03:07:15.15938Z"}],"ghsa":[{"id":"GHSA-wmfg-55f9-j8hq","title":"Server-Side Template Injection","description":"### Impact\nA Server-Side Template Injection was identified in BrowserUp Proxy enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. This has been assigned CVE-2020-26282.\n\n### Patches\nEffective Immediately, all users should upgrade to version 2.1.2 or higher.\n\n### Workarounds\nNone. \n\n### References\nhttps://securitylab.github.com/research/bean-validation-RCE\n\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [the BrowserUp Proxy repo](http://github.com/browserup/browserup-proxy)\n* Contact us via  the [BrowserUp website](https://browserup.com) or email us at [support@browserup.com](mailto:support@browserup.com)","status":"published","published":"2020-12-24T20:49:34Z","modified":"2023-02-01T05:05:07Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:36:32.918681Z"}],"nvd":[{"id":"CVE-2020-26282","description":"BrowserUp Proxy allows you to manipulate HTTP requests and responses, capture HTTP content, and export performance data as a HAR file. BrowserUp Proxy works well as a standalone proxy server, but it is especially useful when embedded in Selenium tests. A Server-Side Template Injection was identified in BrowserUp Proxy enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. This has been patched in version 2.1.2.","status":"published","published":"2020-12-24T21:15:12.727Z","modified":"2026-06-17T03:07:59.597Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical","assessor":"secondary"},{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:06:28.340168Z"}],"osv":[{"id":"CVE-2020-26282","description":"BrowserUp Proxy allows you to manipulate HTTP requests and responses, capture HTTP content, and export performance data as a HAR file. BrowserUp Proxy works well as a standalone proxy server, but it is especially useful when embedded in Selenium tests. A Server-Side Template Injection was identified in BrowserUp Proxy enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. This has been patched in version 2.1.2.","status":"published","published":"2020-12-24T21:15:12.727Z","modified":"2026-10-20T14:05:16.738837505Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:16.248747Z"},{"id":"GHSA-wmfg-55f9-j8hq","title":"Server-Side Template Injection","description":"### Impact\nA Server-Side Template Injection was identified in BrowserUp Proxy enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. This has been assigned CVE-2020-26282.\n\n### Patches\nEffective Immediately, all users should upgrade to version 2.1.2 or higher.\n\n### Workarounds\nNone. \n\n### References\nhttps://securitylab.github.com/research/bean-validation-RCE\n\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [the BrowserUp Proxy repo](http://github.com/browserup/browserup-proxy)\n* Contact us via  the [BrowserUp website](https://browserup.com) or email us at [support@browserup.com](mailto:support@browserup.com)","status":"published","published":"2020-12-24T20:49:34Z","modified":"2026-09-10T03:49:13.879483593Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T15:46:58.767335Z"}]}}