CVE-2025-5591: Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an a

Routine

MEDIUM 5.4UPGRADE

CVE-2025-5591 is a medium-severity flaw (CVSS 5.4) affecting xperience. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-79, CWE-1188
Published	2026-01-05
Last modified	2026-10-07

Publisher (CNA): The Missing Link Australia (TML) · Vendor: kentico

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-05 01:15 UTCPublished CVE record published
2026-10-07 11:10 UTCUpdated Record last modified

kentico xperience UPGRADE

Affected: >= 13.0.0 and < 13.0.167

Fixed in: 13.0.167

Safe to downgrade to: a release before 13.0.0

1. Check installed version

apt-cache policy xperience || rpm -q xperience || xperience --version

2. UPGRADE to 13.0.167 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade xperience

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xperience

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 13.0.0 (Debian / Ubuntu)

apt-cache madison xperience sudo apt install xperience=<VERSION_BEFORE_13.0.0> sudo apt-mark hold xperience

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list xperience sudo dnf downgrade xperience-<VERSION_BEFORE_13.0.0> sudo dnf versionlock add xperience

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-5591?

xperience: upgrade to 13.0.167. Exact commands for each OS are on this page.

Is CVE-2025-5591 being exploited?

CVE-2025-5591 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-5591 affect?

CVE-2025-5591 affects xperience. Severity is medium (CVSS 5.4). 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 urgent is CVE-2025-5591?

Priority 21/100. No elevated risk signals yet.

Related CVEs

CVE-2020-36890 HIGH 7.2 UPGRADE An access control bypass vulnerability in Kentico Xperience allows administrators to modify global administrat
CVE-2025-32370 HIGH 7.2 UPGRADE Kentico Xperience before 13.0.178 has a specific set of allowed ContentUploader file extensions for unauthenti
CVE-2025-32369 MEDIUM 6.4 UPGRADE Kentico Xperience before 13.0.181 allows authenticated users to distribute malicious content (for stored XSS)
CVE-2025-2794 HIGH 8.7 UPGRADE An unsafe reflection vulnerability in Kentico Xperience allows an unauthenticated attacker to kill the current
CVE-2025-2749 HIGH 7.2 EXPLOITED UPGRADE Kentico Xperience Path Traversal Vulnerability

References

← Back to latest CVEs