How severe is CVE-2025-5591?

CVE-2025-5591 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-5591 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-5591?

CVE-2025-5591 affects Kentico Xperience. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-5591?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-5591 have an EU (EUVD) identifier?

Yes. CVE-2025-5591 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0919.

When was CVE-2025-5591 published?

CVE-2025-5591 was published on 2026-01-05 and last updated on 2026-06-17.

CVE-2025-5591

CVE-2025-5591 is a medium-severity vulnerability in Kentico Xperience with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 7.7
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-0919
Weakness: CWE-79
Affected product: Kentico Xperience
Published: 2026-01-05
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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 security context.
How severe is CVE-2025-5591?: CVE-2025-5591 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-5591 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-5591?: CVE-2025-5591 affects Kentico Xperience. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-5591?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-5591 have an EU (EUVD) identifier?: Yes. CVE-2025-5591 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0919.
When was CVE-2025-5591 published?: CVE-2025-5591 was published on 2026-01-05 and last updated on 2026-06-17.

References

https://www.themissinglink.com.au/security-advisories/cve-2025-5591

Affected products (1)

cpe:2.3:a:kentico:xperience:*:*:*:*:*:*:*:*

More vulnerabilities in Kentico Xperience

CVE-2025-2747 — Critical (CVSS 9.8): An authentication bypass vulnerability in Kentico Xperience allows authentication bypass via the Staging Sync Server…
CVE-2025-2746 — Critical (CVSS 9.8): An authentication bypass vulnerability in Kentico Xperience allows authentication bypass via the Staging Sync Server…
CVE-2019-10068 — Critical (CVSS 9.8): An issue was discovered in Kentico 12.0.x before 12.0.15, 11.0.x before 11.0.48, 10.0.x before 10.0.52, and 9.x…
CVE-2017-17736 — Critical (CVSS 9.8): Kentico 9.0 before 9.0.51 and 10.0 before 10.0.48 allows remote attackers to obtain Global Administrator access by…
CVE-2019-12102 — Critical (CVSS 9.1): Kentico 11 through 12 lets attackers upload and explore files without authentication via the…
CVE-2021-47711 — High (CVSS 8.8): A SQL injection vulnerability in Kentico Xperience allows authenticated editors to inject malicious SQL queries via…

All CVEs affecting Kentico Xperience →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →