{“lastseen”:””,”description”:”Concrete CMS 9 to 9.4.2 and versions below 8.5.21 are vulnerable to Reflected Cross-Site Scripting (XSS) in the Conversation Messages Dashboard Page.\u00a0Unsanitized input could cause theft of session cookies or tokens, defacement of web content, redirection to malicious sites, and (if victim is an admin), the execution of unauthorized actions.\u00a0The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0\/AV:N\/AC:L\/AT:N\/PR:H\/UI:P\/VC:L\/VI:L\/VA:N\/SC:N\/SI:N\/SA:N.\u00a0Thanks Fortbridge https:\/\/fortbridge.co.uk\/ \u00a0for performing a penetration test and vulnerability assessment on Concrete CMS and reporting this issue.”,”published”:”2025-08-05T22:37:14.759Z”,”modified”:”2025-08-06T20:25:03.661Z”,”type”:”cve”,”title”:”Concrete CMS 9 through 9.4.2 and below 8.5.21 is vulnerable to Reflected Cross-Site Scripting (XSS) in Conversation Messages Dashboard Page”,”source”:”ConcreteCMS”,”references”:”https:\/\/documentation.concretecms.org\/developers\/introduction\/version-history\/8521-release-notes\\nhttps:\/\/documentation.concretecms.org\/9-x\/developers\/introduction\/version-history\/943-release-notes\\nhttps:\/\/www.concretecms.org\/download”,”id”:”CVE-2025-8571″,”bulletinFamily”:””,”cwe”:[“CWE-20″],”cvelist”:null,”sourceData”:”Concrete CMS Concrete CMS 9.0.0\\nConcrete CMS Concrete CMS 5.6″,”sourceHref”:””,”cvss”:{“score”:4.8,”severity”:”MEDIUM”,”vector”:”CVSS:4.0\/AV:N\/AC:L\/AT:N\/PR:H\/UI:P\/VC:L\/VI:L\/VA:N\/SC:N\/SI:N\/SA:N”,”version”:”4.0″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”Concrete CMS”,”version”:”9.0.0″,”vendor”:”Concrete CMS”,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:””,”description”:”Concrete CMS 9 to 9.4.2 and versions below 8.5.21 are vulnerable to Reflected Cross-Site Scripting (XSS) in the Conversation Messages Dashboard Page.\u00a0Unsanitized input could cause…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,75,12,21,13,7,11,5],"class_list":["post-11241","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-48","tag-exploit","tag-medium","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n