# CVE-2021-31181: Microsoft SharePoint Remote Code Execution Vulnerability

- Exploited (CISA KEV): no
- Published: 2021-05-11
- CVSS: 8.8 HIGH (v3.1)
- EPSS: 29.0% (98th percentile)

Microsoft SharePoint Remote Code Execution Vulnerability

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

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

### F5

- 2025-04-28 · updated · rule 200104651
  > Updated: signature 200104651 "SharePoint XmlUrlDataSource Information Disclosure (2)" (Server Side Code Injection, risk Medium), systems: SharePoint. References: CVE-2021-31181.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2025-05-22 · updated · rule 200104651
  > Updated: signature 200104651 "SharePoint XmlUrlDataSource Information Disclosure (2)" (Server Side Code Injection, risk Medium), systems: SharePoint. References: CVE-2021-31181.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

"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-2021-31181 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2021-31181