CVE-2025-5591 Kentico CVE debrief

Who should care

Defenders responsible for Kentico Xperience 13 installations should assess exposure and prioritize remediation to prevent session hijacking.

Why it matters

CVE-2025-5591 is a stored cross-site scripting vulnerability in Kentico Xperience 13 that allows session hijacking. Defenders should verify exposure, apply remediation, and monitor for suspicious activity.

• Session hijacking and unauthorized actions within the security context of a victim user
• Potential for attackers to perform malicious actions on behalf of the victim user
• Need for defenders to verify exposure and apply remediation to prevent exploitation
• Importance of monitoring for suspicious activity related to form components

Technical summary

CVE-2025-5591 is a stored cross-site scripting vulnerability in Kentico Xperience 13, allowing an attacker to hijack a victim user's session and perform actions in their security context. The vulnerability exists in a form component and has a CVSS score of 7.7.

Defensive priority

Defenders should prioritize verifying exposure of Kentico Xperience 13 installations and applying vendor remediation to prevent session hijacking.

Recommended defensive actions

• Verify Kentico Xperience 13 installations for exposure
• Apply vendor remediation to prevent session hijacking
• Monitor for suspicious activity related to form components

Evidence notes

The CVE record and NVD entry provide details on the stored cross-site scripting vulnerability in Kentico Xperience 13. A third-party advisory from The Missing Link offers additional context.

Sources and references

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.