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  4. CVE 2026 81898 concrete cms below version 953 is vulnerable to
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Back to active CVEs
High · CVSS 7.5CVE-2026-81898

Concrete CMS below version 9.5.3 is vulnerable to Stored XSS via country-less Address attribute in Express association viewsCVE-2026-81898

Answer in brief

CVE-2026-81898 records a High severity (CVSS 7.5) vulnerability in Concrete CMS below version 9.5.3 is vulnerable to Stored XSS via country-less Address attribute in Express association views. The current sources do not mark it as known exploited. The current feed maps Concrete CMS/Concrete CMS (generic), Concrete CMS/Concrete CMS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 15, 2026Updated Sep 20, 2026Source checked Oct 30, 2026First seen by HOL Sep 15, 2026Material review Sep 20, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Concrete CMS/Concrete CMS (generic), Concrete CMS/Concrete CMS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Concrete CMS/Concrete CMSgeneric5.0.0Not reported
Concrete CMS/Concrete CMSgeneric>=5.0.0 <=9.5.2Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Concrete CMS/Concrete CMS, Concrete CMS/Concrete CMS.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Sep 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 20, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 15, 2026

Sources and claim methodology

  • Source referencedocumentation.concretecms.org
Upstream source description

In Concrete CMS below version 9.5.3, the Address attribute's country-less text formatter skipped HTML-escaping, enabling stored XSS in Express association views. A user able to submit an Address attribute could execute script in the session of any dashboard user who opened the affected entry. The unescaped branch was reachable because a non-required Address attribute accepted a blank country, and because several Express association templates (for example concrete/elements/express/form/view/dashboard/association.php) echoed the association label mask without applying h(). The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 7.5 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Yonatan Drori from Tenzai for reporting.

Quoted source text, attributed separately from HOL analysis.

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  • WordPress Ad Inserter plugin <= 2.8.19 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress MultiVendorX plugin <= 5.0.20 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress VikRentCar plugin <= 1.4.9 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress Mang Board WP plugin <= 2.4.6 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress eCommerce Product Catalog plugin <= 3.6.5 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress WP Customer Area plugin <= 8.4.0 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 30, 2026
References
1 linked source
Open source record