{"id":"CVE-2026-39935","aliases":["EUVD-2026-19980","GHSA-g2mp-vfg6-8xwm"],"status":"published","title":"XSS-via-i18n in localised wiki names","description":"Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS). This issue was remediated only on the `master` branch.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00278,"percentile":0.20443,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-04-07T22:04:02Z","modified":"2026-07-21T19:10:00Z","products":[{"vendor":"the wikimedia foundation","product":"mediawiki - campaignevents extension"}],"references":[{"url":"https://phabricator.wikimedia.org/T418254"},{"url":"https://gerrit.wikimedia.org/r/c/1249320"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39935"},{"url":"https://github.com/advisories/GHSA-g2mp-vfg6-8xwm"}],"sources":{"cve":[{"id":"CVE-2026-39935","title":"XSS-via-i18n in localised wiki names","description":"Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS). This issue was remediated only on the `master` branch.","status":"published","published":"2026-04-07T22:04:02.098Z","modified":"2026-04-08T22:06:48.795Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:20:02.662847Z"}],"euvd":[{"id":"EUVD-2026-19980","description":"Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS). This issue was remediated only on the `master` branch.","status":"published","published":"2026-04-07T22:04:02Z","modified":"2026-04-08T22:06:48Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L","level":"medium"}],"updated_at":"2026-11-02T19:24:31.230458Z"}],"ghsa":[{"id":"GHSA-g2mp-vfg6-8xwm","title":"Improper neutralization of input during web page generation ('cross-site scripting')...","description":"Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - CampaignEvents Extension: 1.43.7, 1.44.4, 1.45.2.","status":"published","published":"2026-04-08T00:30:26Z","modified":"2026-04-08T00:30:33Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/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"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:07:11.605224Z"}],"nvd":[{"id":"CVE-2026-39935","description":"Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS). This issue was remediated only on the `master` branch.","status":"published","published":"2026-04-07T23:16:27.38Z","modified":"2026-07-21T19:10:00.107Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/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"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:13.535987Z"}]}}