{"id":"CVE-2013-4522","aliases":["EUVD-2013-4381","GHSA-vm9c-39jx-q45w","MGASA-2013-0356","UBUNTU-CVE-2013-4522"],"status":"published","title":"Moodle vulnerable to Exposure of Sensitive Information to an Unauthorized Actor","description":"lib/filelib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 does not send \"Cache-Control: private\" HTTP headers, which allows remote attackers to obtain sensitive information by requesting a file that had been previously retrieved by a caching proxy server.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01538,"percentile":0.75026,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2013-11-26T02:00:00Z","modified":"2026-06-16T23:57:23Z","fixes":[{"ecosystem":"Packagist","package":"moodle/moodle","fixed_in":["2.3.10","2.4.7","2.5.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.10"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0-beta"},{"fixed":"2.4.7"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0-beta"},{"fixed":"2.5.3"}]}]},{"source":"osv","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.10"}]}],"versions":["v2.3.4","v2.3.5","v2.3.6","v2.3.7","v2.3.8","v2.3.9"]},{"source":"osv","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0-beta"},{"fixed":"2.4.7"}]}],"versions":["v2.4.0","v2.4.0-rc1","v2.4.1","v2.4.2","v2.4.3","v2.4.4","v2.4.5","v2.4.6"]},{"source":"osv","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.5.0-beta"},{"fixed":"2.5.3"}]}],"versions":["v2.5.0","v2.5.0-beta","v2.5.0-rc1","v2.5.1","v2.5.2"]},{"source":"osv","ecosystem":"Mageia:3","package":"moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.7-1.mga3"}]}],"bundled":4}],"products":[{"vendor":"moodle","product":"moodle"}],"references":[{"url":"http://git.moodle.org/gw?p=moodle.git\u0026a=search\u0026h=HEAD\u0026st=commit\u0026s=MDL-38743","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","web","report"]},{"url":"https://moodle.org/mod/forum/discuss.php?d=244479","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","web","report"]},{"url":"http://openwall.com/lists/oss-security/2013/11/25/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-4522","tags":["advisory"]},{"url":"https://github.com/moodle/moodle/commit/d0041fb110201d3dc1a4546eca8b6108b440d1c5","tags":["web"]},{"url":"https://github.com/advisories/GHSA-vm9c-39jx-q45w"},{"url":"https://github.com/moodle/moodle","tags":["package"]},{"url":"https://advisories.mageia.org/MGASA-2013-0356.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=11671","tags":["report"]},{"url":"https://moodle.org/mod/forum/discuss.php?d=244480","tags":["web"]},{"url":"https://moodle.org/mod/forum/discuss.php?d=244481","tags":["web"]},{"url":"https://moodle.org/mod/forum/discuss.php?d=244482","tags":["web"]},{"url":"http://docs.moodle.org/dev/Moodle_2.4.7_release_notes","tags":["web"]},{"url":"https://moodle.org/mod/forum/discuss.php?d=243213","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2013-4522","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2013-4522","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2013-4522","description":"lib/filelib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 does not send \"Cache-Control: private\" HTTP headers, which allows remote attackers to obtain sensitive information by requesting a file that had been previously retrieved by a caching proxy server.","status":"published","published":"2013-11-26T02:00:00Z","modified":"2024-08-06T16:45:15.089Z","updated_at":"2026-11-02T14:34:57.869657Z"}],"euvd":[{"id":"EUVD-2013-4381","description":"lib/filelib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 does not send \"Cache-Control: private\" HTTP headers, which allows remote attackers to obtain sensitive information by requesting a file that had been previously retrieved by a caching proxy server.","status":"published","published":"2013-11-26T02:00:00Z","modified":"2024-08-06T16:45:15Z","updated_at":"2026-11-03T01:56:31.067159Z"}],"ghsa":[{"id":"GHSA-vm9c-39jx-q45w","title":"Moodle vulnerable to Exposure of Sensitive Information to an Unauthorized Actor","description":"lib/filelib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 does not send \"Cache-Control: private\" HTTP headers, which allows remote attackers to obtain sensitive information by requesting a file that had been previously retrieved by a caching proxy server.","status":"published","published":"2022-05-13T01:12:54Z","modified":"2025-05-08T17:35:25Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:38:43.172412Z"}],"nvd":[{"id":"CVE-2013-4522","description":"lib/filelib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 does not send \"Cache-Control: private\" HTTP headers, which allows remote attackers to obtain sensitive information by requesting a file that had been previously retrieved by a caching proxy server.","status":"published","published":"2013-11-26T05:25:38.57Z","modified":"2026-06-16T23:57:23.08Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:02:44.596064Z"}],"osv":[{"id":"GHSA-vm9c-39jx-q45w","title":"Moodle vulnerable to Exposure of Sensitive Information to an Unauthorized Actor","description":"lib/filelib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 does not send \"Cache-Control: private\" HTTP headers, which allows remote attackers to obtain sensitive information by requesting a file that had been previously retrieved by a caching proxy server.","status":"published","published":"2022-05-13T01:12:54Z","modified":"2025-05-08T18:27:29.561311Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:46:57.348035Z"},{"id":"MGASA-2013-0356","title":"Updated moodle package fixes security vulnerabilities","description":"Some files were being delivered with incorrect headers in Moodle before\n2.4.7, meaning they could be cached downstream (CVE-2013-4522).\n\nCross-site scripting in Moodle before 2.4.7 due to JavaScript in messages\nbeing executed on some pages (CVE-2013-4523).\n\nThe file system repository in Moodle before 2.4.7 was allowing access to\nfiles beyond the Moodle file area (CVE-2013-4524).\n\nCross-site scripting in Moodle before 2.4. due to JavaScript in question\nanswers being executed on the Quiz Results page (CVE-2013-4525).\n","status":"published","published":"2013-11-30T21:24:35Z","modified":"2026-04-16T06:26:21.696500053Z","updated_at":"2026-11-02T15:49:39.121227Z"},{"id":"UBUNTU-CVE-2013-4522","description":"lib/filelib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 does not send \"Cache-Control: private\" HTTP headers, which allows remote attackers to obtain sensitive information by requesting a file that had been previously retrieved by a caching proxy server.","status":"withdrawn","published":"2013-11-26T05:25:00Z","modified":"2025-07-16T08:10:47.138216Z","updated_at":"2026-11-02T15:54:07.421078Z"}]}}