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PatchSiren cyber security CVE debrief

CVE-2026-66621 MapSteps UG CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-18T15:16:57.290Z and has not been modified since then. CVE-2026-66621 is a DOM-Based XSS vulnerability in Ultimate Dashboard Pro, affecting versions from n/a through 3.11.2. The vulnerability has a CVSS score of 7.1 and is classified as HIGH severity. This type of vulnerability allows attackers to inject malicious scripts into web pages, potentially leading to unauthorized actions or data breaches. Defenders should focus on patching Ultimate Dashboard Pro instances, especially those exposed to the internet, to prevent potential XSS attacks. Evidence is limited; primary official records indicate a DOM-Based XSS vulnerability in Ultimate Dashboard Pro. Verification of affected scope and vendor remediation status is needed.

Vendor
MapSteps UG
Product
Ultimate Dashboard Pro
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-18
Original CVE updated
2026-08-25
Advisory published
2026-08-18
Advisory updated
2026-08-25

Who should care

Administrators and defenders of Ultimate Dashboard Pro instances, especially those exposed to the internet, should be aware of this vulnerability and take necessary actions to mitigate it. This includes reviewing system configurations, monitoring for suspicious activity, and ensuring that all instances are updated to a version above 3.11.2. Additionally, security teams should prioritize vulnerability management for this product, given its potential impact on web application security.

Technical summary

CVE-2026-66621 is a DOM-Based XSS vulnerability in Ultimate Dashboard Pro, affecting versions from n/a through 3.11.2. The vulnerability has a CVSS score of 7.1 and is classified as HIGH severity. This type of vulnerability allows attackers to inject malicious scripts into web pages, potentially leading to unauthorized actions or data breaches. Defenders should focus on patching Ultimate Dashboard Pro instances, especially those exposed to the internet, to prevent potential XSS attacks.

Defensive priority

Defenders should prioritize patching Ultimate Dashboard Pro instances, especially those exposed to the internet, to prevent potential XSS attacks.

Recommended defensive actions

  • Patch Ultimate Dashboard Pro to version above 3.11.2
  • Inventory and verify exposure of Ultimate Dashboard Pro instances
  • Monitor for suspicious activity related to Ultimate Dashboard Pro

Evidence notes

Evidence is limited; primary official records indicate a DOM-Based XSS vulnerability in Ultimate Dashboard Pro. Verification of affected scope and vendor remediation status is needed. The CVE record was published on 2026-08-18T15:16:57.290Z and has not been modified since then. Limited source detail suggests defenders verify exposure and review vendor guidance for Ultimate Dashboard Pro instances, especially those exposed to the internet.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-66621 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-66621

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-66621 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-66621

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.