PT-2026-42563 · Unknown · Concrete Cms

Yonatan Drori · Published 2026-05-21 · Updated 2026-05-22 · CVE-2026-8245

Positive Technologies (AI Summary)

CVSS v4.0

6.0

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Concrete CMS versions prior to 9.5.1

Description Reflected Cross-Site Scripting (XSS) occurs in Legacy Pagination through HTML attribute injection. The ConcreteCoreLegacyPagination class constructs pagination links by raw-interpolating the $URL variable into the href attribute of an anchor tag. An authenticated administrator or report viewer with access to the '/dashboard/reports/forms/legacy' endpoint can trigger the payload in their session by clicking a crafted URL.

Recommendations Update to a version newer than 9.5.0. Restrict access to the '/dashboard/reports/forms/legacy' endpoint to minimize the risk of exploitation.

Fix

Weakness Enumeration

CWE-83

Related Identifiers

CVE-2026-8245

Affected Products

Concrete Cms

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-8245 · Security Note
• https://t.me/CVEtracker/54560 · Telegram Post
• https://twitter.com/infoflowcloud/status/2057785090936127741 · Twitter Post
• https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes · Note
• https://twitter.com/CVEnew/status/2057783215029432804 · Twitter Post