# CVE-2025-53693: HTML Cache Poisoning through Unsafe Reflections

- Exploited (CISA KEV): no
- Published: 2025-09-03
- CVSS: 9.8 CRITICAL (v3.1)
- EPSS: 19.9% (97th percentile)
- CWE: CWE-470

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Sitecore Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Cache Poisoning.This issue affects Sitecore Experience Manager (XM): from 9.0 through 9.3, from 10.0 through 10.4; Experience Platform (XP): from 9.0 through 9.3, from 10.0 through 10.4.

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

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Blocks by default | 2025-09-04 | 1 |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2025-12-03 | 91 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### Cloudflare

- 2025-09-04 · new · rule d1bd7563e6254db48ce703807c5b669c · default Block
  > Sitecore - Cache Poisoning - CVE:CVE-2025-53693. Previous action: N/A. New action: Block. This is a new detection
  Source: https://developers.cloudflare.com/changelog/post/2025-09-04-emergency-waf-release/
- 2026-05-20 · updated · rule bcdcec3ea63a480896513dc39e9c068d · default Block
  > Sitecore - Cache Poisoning - CVE:CVE-2025-53693 Beta. Previous action: N/A. New action: Block. This rule is merged into the original rule "Sitecore - Cache Poisoning - CVE:CVE-2025-53693" (ID: ...7c5b669c ).
  Source: https://developers.cloudflare.com/changelog/post/2026-05-20-waf-release/

### F5

- 2025-12-03 · new · rule 200018197
  > Added: signature 200018197 "Sitecore HTML Cache Poisoning" (Other Application Attacks, risk High), systems: ASP, ASP.NET. References: CVE-2025-53693.
  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-2025-53693 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2025-53693