Security Digest · Vulnerability record · Known exploited
CVE-2025-2746: Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel Vulnerability
Exploited in the wild (CISA KEV). An authentication bypass vulnerability in Kentico Xperience allows authentication bypass via the Staging Sync Server password handling of empty SHA1 usernames in digest authentication.
CISA KEV · added 2025-10-20 CVSS 9.8 Critical EPSS 74.1% · p99
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Kentico Xperience CMS. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-10-20, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-11-10; treat that as the outer limit, not the target.
- EPSS 74.1%, percentile 99: FIRST’s model estimates a 74.1% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
What it is
An authentication bypass vulnerability in Kentico Xperience allows authentication bypass via the Staging Sync Server password handling of empty SHA1 usernames in digest authentication. Authentication bypass allows an attacker to control administrative objects.This issue affects Xperience through 13.0.172.
CISA’s summary
Kentico Xperience CMS contains an authentication bypass using an alternate path or channel vulnerability that could allow an attacker to control administrative objects.
Weakness type: CWE-288.
Product: Kentico Xperience CMS · Assigned by: VulnCheck · Published: 2025-03-24
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Kentico | Xperience | <= 13.0.172 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulnCheck | 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2025-10-20; federal due date 2025-11-10. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 74.06% probability of exploitation activity in the next 30 days; percentile 99.
Timeline
- — CVE record published by VulnCheck
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- devnet.kentico.com devnet.kentico.com
Vulnerability records
- CVE.org record CVE-2025-2746 cve.org
- NVD entry CVE-2025-2746 nvd.nist.gov
Government
Other references from the CVE record and advisory
- labs.watchtowr.com labs.watchtowr.com
- github.com github.com
- vulncheck.com vulncheck.com
All exploited Kentico vulnerabilities · Today’s Security Digest