{"schemaVersion":3,"id":"CVE-2023-3550","aliases":["UBUNTU-CVE-2023-3550","DEBIAN-CVE-2023-3550"],"status":"published","duplicateOf":null,"title":null,"description":"Mediawiki v1.40.0 does not validate namespaces used in XML files.\n\nTherefore, if the instance administrator allows XML file uploads,\n\na remote attacker with a low-privileged user account can use this\n\nexploit to become an administrator by sending a malicious link to\n\nthe instance administrator.","dates":{"published":"2023-09-25T15:20:27.351Z","modified":"2025-02-13T16:55:50.983Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.3,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.3,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":9,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","exploitability":5.9,"impact":10,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.3,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","exploitability":5.4,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.3,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0138,"percentile":0.71736,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.22900000000000004,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.01151},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0138,"percentile":0.71736}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01151,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0138,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0138,"percentile":0.71736}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_ED763EFFDA5E48C7","name":"Exploit Reference (fluidattacks.com)","source":"reference","url":"https://fluidattacks.com/advisories/blondie/","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","description":"The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/79.html"}],"affected":[{"vendor":"debian","product":"mediawiki","name":"mediawiki","label":"mediawiki","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/mediawiki","purlType":"deb","versions":[{"text":"< 1:1.39.5-1~deb12u1","noFixRecorded":false,"fixedIn":null},{"text":"< 1:1.39.5-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:1.39.5-1~deb12u1 | < 1:1.39.5-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mediawiki","name":"mediawiki","label":"mediawiki","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mediawiki","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"debian","product":"debian_linux","name":"debian linux","label":"debian_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"10.0","noFixRecorded":false,"fixedIn":null},{"text":"11.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"10.0 | 11.0","eol":{"isEol":true,"eolDate":"2024-06-30T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"10","label":"10 (Buster)","eolFrom":"2024-06-30T00:00:00.000Z","isLts":false,"isMaintained":true,"latestVersion":"10.13"},"product":{"name":"debian","label":"Debian","category":"os"}},"hubHref":"/vendor/debian/debian_linux"},{"vendor":"mediawiki","product":"mediawiki","name":"mediawiki","label":"mediawiki","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"1.40.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"1.40.0","eol":{"isEol":true,"eolDate":"2024-06-28T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"1.40","label":"1.40","eolFrom":"2024-06-28T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":"1.40.4"},"product":{"name":"mediawiki","label":"MediaWiki","category":"server-app"}},"hubHref":"/vendor/mediawiki/mediawiki"}],"affectedCount":4,"eol":{"hasEol":true,"count":2},"references":[{"url":"https://fluidattacks.com/advisories/blondie/","label":"fluidattacks.com/advisories/blondie/","hostname":"fluidattacks.com","tags":["REPORT","Exploit","Third Party Advisory"]},{"url":"https://www.mediawiki.org/wiki/MediaWiki/","label":"www.mediawiki.org/wiki/MediaWiki/","hostname":"www.mediawiki.org","tags":["REPORT","Product"]},{"url":"https://www.debian.org/security/2023/dsa-5520","label":"www.debian.org/security/2023/dsa-5520","hostname":"www.debian.org","tags":["Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html","label":"lists.debian.org/debian-lts-announce/2023/11/msg00027.html","hostname":"lists.debian.org","tags":["Mailing List","Third Party Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":[]},{"url":"https://ubuntu.com/security/CVE-2023-3550","label":"ubuntu.com/security/CVE-2023-3550","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://phabricator.wikimedia.org/T341565","label":"phabricator.wikimedia.org/T341565","hostname":"phabricator.wikimedia.org","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-3550","label":"www.cve.org/CVERecord?id=CVE-2023-3550","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-3550","label":"security-tracker.debian.org/tracker/CVE-2023-3550","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["DLA-3671-1","DSA-5520-1","MGASA-2024-0155"],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2023-09-25T15:20:27.351Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-02-13T16:55:50.983Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":39,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T20:14:41.629Z","stale":false,"partial":false}}