CVE-2026-52307: Stored XSS in 1CMS v5.6
CVE-2026-52307: authenticated stored XSS in 1CMS (ClassCMS) v5.6 Column Management lets attackers inject scripts via the title field.
ClassCMS 1CMS v5.6 contains an authenticated stored cross-site scripting vulnerability, CVE-2026-52307, in the Column Management component. Attackers can execute arbitrary web scripts or HTML by injecting a crafted payload into the title field. No CVSS score, patch information, or exploitation evidence was provided in the disclosure.