# CVE-2025-27218: CVE-2025-27218

- Exploited (CISA KEV): no
- Published: 2025-02-20
- CVSS: 5.3 MEDIUM (v3.1)
- EPSS: 65.0% (99th percentile)

Sitecore Experience Manager (XM) and Experience Platform (XP) 10.4 before KB1002844 allow remote code execution through insecure deserialization.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Blocks by default | 2025-04-02 | 41 |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2025-04-28 | 67 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### Cloudflare

- 2025-04-02 · new · rule 8b8074e73b7d4aba92fc68f3622f0483 · default Block
  > Sitecore - Code Injection - CVE:CVE-2025-27218. Previous action: Log. New action: Block. This is a New Detection
  Source: https://developers.cloudflare.com/changelog/post/2025-04-02-waf-release/

### F5

- 2025-04-28 · new · rule 200204009
  > Added: signature 200204009 "Sitecore Unsafe Deserialization" (Server Side Code Injection, risk High), systems: Microsoft Windows, IIS, ASP, ASP.NET. References: CVE-2025-27218.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2025-05-22 · new · rule 200204009
  > Added: signature 200204009 "Sitecore Unsafe Deserialization" (Server Side Code Injection, risk High), systems: Microsoft Windows, IIS, ASP, ASP.NET. References: CVE-2025-27218.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

## Our test (measured)

- OWASP Core Rule Set 4.25.0, paranoia level 1, anomaly threshold 5, default CRS settings: passed (0 of 1 requests blocked), template CVE-2025-27218, 2026-11-02
- OWASP Core Rule Set 4.25.0, paranoia level 2, anomaly threshold 5, default CRS settings: passed (0 of 1 requests blocked), template CVE-2025-27218, 2026-11-02

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2025-27218 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2025-27218