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Vulnerabilities

Security incident · CVE-2025-5591

Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user’s session and perform actions in their

Published Jan 5, 2026 · catalog updated Jan 5, 2026 · Kentico Kentico Xperience

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-5591. EPSS is 0.17%. Act only if a listed version of Kentico Kentico Xperience is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.17%
Remediation
Advisory link
Affected products
vendor Kentico Kentico Xperience 13.0.167

Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user’s session and perform actions in their security context.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Kentico Kentico Xperience 13.0.16713.0.167

How to fix CVE-2025-5591

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-5591. EPSS is 0.17%. Act only if a listed version of Kentico Kentico Xperience is installed.

Which versions are affected?

Compare what you have installed with Kentico Kentico Xperience 13.0.167 13.0.167. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.17%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 5, 2026 · EUVD

    Detected

    Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user’s session and perform actions in their security context.

  2. Jan 5, 2026 · EUVD

    Updated

    Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user’s session and perform actions in their security context.

Sources

  • CVE.orgVulnerability recordCVE-2025-5591

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-5591

    30-day exploitation probability 0.17%

    first.org
  • EUVDVulnerability recordEUVD-2026-0919

    Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user’s session and perform actions in their security context.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 3, 2026
  • CVE.orgOct 31, 2026
  • EUVDOct 31, 2026