What happened

CISA added CVE-2025-2747 to the Known Exploited Vulnerabilities (KEV) catalog on 2025-10-20, signaling observed in-the-wild exploitation CISA KEV. The entry targets Kentico Xperience CMS and is classified as an authentication bypass using an alternate path or channel NVD entry. The weakness aligns with CWE-288, where adversaries access protected functions via a different path or communication channel than the intended authenticated route CWE-288.

Per the KEV notice, federal agencies must apply vendor mitigations or discontinue use by the due date 2025-11-10, and follow BOD 22-01 guidance for cloud services CISA KEV. The vulnerability could allow an attacker to control administrative objects if the bypass condition is met NVD entry. CISA lists known ransomware campaign use as Unknown for this CVE CISA KEV.

Why it matters

An authentication bypass in a CMS cuts straight past front-door controls and into privileged surfaces that govern site content, users, and integrations NVD entry. CWE-288 classes are dangerous because they exploit inconsistencies in how different paths or channels enforce auth, often dodging normal middleware or SSO flows CWE-288. KEV inclusion means exploitation is known, not hypothetical, which raises the priority for immediate mitigation and exposure reduction CISA KEV.

For Kentico Xperience CMS operators, the risk profile is direct control over administrative objects if an attacker reaches an unguarded route or alternate channel that lacks equivalent authentication NVD entry. In content platforms, that typically translates to content defacement, data exfiltration via export features, or lateral access through plugin/integration management if such panels are exposed via a bypassable path CWE-288.

Technical detail

CVE-2025-2747 is defined as “Authentication Bypass Using an Alternate Path or Channel,” the core pattern of CWE-288 MITRE CVE. In this weakness, the system exposes two or more ways to reach a protected operation, but only the primary path reliably enforces authentication CWE-288. Bypasses emerge when alternate handlers, legacy routes, or secondary channels lack identical auth checks, enabling access without valid credentials CWE-288.

CISA’s synopsis for this CVE states an attacker could control administrative objects if the bypass can be exercised, underscoring that privileged operations may be reachable through a divergent path CISA KEV. NVD and MITRE both record the CVE as an auth-bypass class issue affecting Kentico Xperience CMS, reflecting consensus across the authoritative catalogs NVD entry MITRE CVE.

Characteristic CWE-288 mechanisms include discrepancies in path normalization or alternate endpoint mappings where URL-encoded, case-varied, or suffixed variants resolve to code paths that skip middleware, or where a secondary channel (e.g., an internal endpoint exposed externally) omits the required auth gate CWE-288. While the vendor-specific mechanics for CVE-2025-2747 are not detailed in public records here, the class and impact are explicitly documented in the federal and CVE catalogs CISA KEV MITRE CVE.

Defense

• Patch/mitigate on vendor guidance without delay; CISA sets a due date of 2025-11-10 for federal programs and advises following BOD 22-01 for cloud services CISA KEV.
• Enforce uniform authentication on all code paths that reach administrative functions; ensure alternate routes are fronted by the same auth middleware per CWE-288 mitigations CWE-288.
• Normalize and canonicalize request paths before authorization decisions, reducing discrepancies that create alternate-path exposure per CWE-288 guidance CWE-288.
• Restrict direct access to administrative objects and panels to trusted networks or strongly authenticated sessions, aligning with the CVE’s impact profile NVD entry.
• Validate that legacy or internal endpoints cannot be accessed via secondary channels that bypass centralized auth controls, a known CWE-288 pitfall CWE-288.

If you operate Kentico Xperience CMS in cloud contexts, map any provider front-ends (e.g., CDN/origin splits, API gateways) to confirm that alternate listeners or paths are uniformly authenticated in line with BOD 22-01 expectations cited by CISA CISA KEV.

Lyrie Verdict

CVE-2025-2747 is tailor-made for automated adversaries: enumeration bots probe path variants, encodings, and secondary channels until one lands past auth—a textbook CWE-288 move CWE-288. Lyrie flags these at machine speed by modeling request-path normalization and auth-gate consistency, alerting when an ostensibly unauthenticated route touches administrative objects as described in the CVE NVD entry. Because KEV confirms active exploitation, we treat any auth-free access to admin surfaces as high-confidence abuse and auto-isolate the path while you patch, aligning with the urgency CISA sets in its KEV directive CISA KEV.