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    CVE-2026-68528

    Concrete CMS RSS Displayer block below version 9.5.3 rendered remote feed item titles without HTML escaping, resulting in stored cross-site scripting. An attacker able to control a title in a syndicated feed could execute script in the site origin for any visitor to the affected page, including administrators, without holding an account on that site. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 6.0 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks riodrwn for reporting.

    Published:Sep 11, 2026
    Last Modified:Sep 12, 2026
    EPS:Sep 11, 2026
    EPSS Score:0.00207
    CVSS Score:6

    Affected Products

    Vendor
    Concretecms
    Product
    Concrete Cms

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-81918 (CVSS 4.8) — Concrete CMS below 9.5.3 is vulnerable to Stored XSS via the Date Format field in the Page Attribute Display b…
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    CVE-2026-68535 (CVSS 5.1) — Concrete CMS Area API's block-create endpoint in versions 9.2.0 to 9.5.2 did not invoke the block type control…
    CVE-2026-81915 (CVSS 5.1) — Concrete CMS below 9.5.3 does not perform an object-level authorization check when a Page Type was updated. Th…
    CVE-2026-68526 (CVSS 5.3) — Concrete CMS before 9.5.3 did not validate an anti-CSRF token in the Calendar event duplicate dialog controlle…
    CVE-2026-81913 (CVSS 5.3) — Concrete CMS versions 9.5.0 through 9.5.2 are vulnerable to Open Redirect via the rcURL parameter. An attacker…
    CVE-2026-81912 (CVSS 5.7) — Concrete CMS before 9.5.3 is vulnerable to Cross-Site Request Forgery in the Move Multiple Groups feature. The…
    CVE-2026-81911 (CVSS 5.8) — Concrete CMS versions 9.0.0 to 9.5.2 is vulnerable to Stored XSS in Board Custom Slot dialog. The custom_slot …
    CVE-2026-81910 (CVSS 5.9) — Concrete CMS 9 through 9.5.2 is vulnerable to Server-Side Template Injection (SSTI) in Theme Customizer via Un…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-68528 — Concretecms (Medium 6) | CVE-DB