Concrete CMS 9.5.0 and below is vulnerable to Reflected XSS in Legacy Pagination via HTML attribute injection

Description

Concrete CMS 9.5.0 and below is vulnerable to Reflected XSS in Legacy Pagination via HTML attribute injection. Concrete\Core\Legacy\Pagination builds pagination links by raw-interpolating its $URL field into href="" (<a href="{$linkURL}" …>). Any authenticated admin or report viewer with access to `/dashboard/reports/forms/legacy` who clicks the crafted URL fires the payload in their session. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.0 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting

Scores

EPSS (exploitation in 30 days)

0.14% · top 97% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.0.

Weakness

• CWE-83 Improper neutralization of script in attributes in a web page (opens in a new tab)All about CWE-83 and its CVEs

Affected products

• Concrete CMS · Concrete CMS

  • affected 5.0 – ≤ 9.5.0

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Packagistconcrete5/concrete5GHSA-f73j-pm2c-rxvr (opens in a new tab)

References (1)

• https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes (opens in a new tab)release-notes

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-f73j-pm2c-rxvr (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-8245](https://trackcve.app/badge/CVE-2026-8245.svg)](https://trackcve.app/cve/CVE-2026-8245)

Record last updated 22 May 2026, 13:13 UTC.