CVE-2025-8571 Details
Concrete CMS 9 to 9.4.2 and versions below 8.5.21 are vulnerable to Reflected Cross-Site Scripting (XSS) in the Conversation Messages Dashboard Page. Unsanitized input could cause theft of session cookies or tokens, defacement of web content, redirection to malicious sites, and (if victim is an admin), the execution of unauthorized actions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Fortbridge https://fortbridge.co.uk/  for performing a penetration test and vulnerability assessment on Concrete CMS and reporting this issue.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2025-8571
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.08 Probability of exploitation activity being observed over the next 30 days (23nd percentile)
CVSS score for CVE-2025-8571
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
4.8 Medium
Products affected by CVE-2025-8571
ConcreteCMS 5.6.1.1
ConcreteCMS 5.6.1.2
ConcreteCMS 5.6.2
ConcreteCMS 5.6.2.1
ConcreteCMS 5.6.3
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2025-8571 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 5,279 36.99%
DE 1,892 13.26%
JP 1,304 9.14%
GB 1,268 8.89%
NL 717 5.02%
CA 598 4.19%
FR 458 3.21%
CH 391 2.74%
PL 389 2.73%
AU 387 2.71%

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CVE-2025-8571 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 10,800 88.39%
Telecommunications 1,021 8.36%
Education 135 1.10%
Business Services 72 0.59%
Media/Entertainment 64 0.52%
Manufacturing 22 0.18%
Government/Politics 22 0.18%
Healthcare/Wellness 19 0.16%
Transportation 15 0.12%
Finance 13 0.11%

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