# CVE-2019-9875: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

- Exploited (CISA KEV): yes, added 2025-03-26
- Published: 2019-05-31
- CVSS: 8.8 HIGH (v3.1)
- EPSS: 25.4% (98th percentile)
- CWE: CWE-502

Deserialization of Untrusted Data in the anti CSRF module in Sitecore through 9.1 allows an authenticated attacker to execute arbitrary code by sending a serialized .NET object in an HTTP POST parameter.

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

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | Before feed history | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | Before feed history | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | Before feed history | — | — |

"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-2019-9875 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2019-9875