# CVE-2018-12538: The Eclipse Foundation Eclipse Jetty

- Exploited (CISA KEV): no
- Published: 2018-06-22
- CVSS: not scored
- EPSS: 2.6% (85th percentile)
- CWE: CWE-6

In Eclipse Jetty versions 9.4.0 through 9.4.8, when using the optional Jetty provided FileSessionDataStore for persistent storage of HttpSession details, it is possible for a malicious user to access/hijack other HttpSessions and even delete unmatched HttpSessions present in the FileSystem's storage for the FileSessionDataStore.

## 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 | Rule published | 2023-08-08 | — |
| Akamai | No public source | — | — |
| OWASP CRS | Before feed history | — | — |

### F5

- 2023-08-08 · updated · rule 200020003
  > Updated: signature 200020003 "Jetty FileBasedSessionStore Session Stealing" (Session Hijacking, risk Medium), systems: Jetty. References: CVE-2018-12538.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2023-09-12 · updated · rule 200020003
  > Updated: signature 200020003 "Jetty FileBasedSessionStore Session Stealing" (Session Hijacking, risk Medium), systems: Jetty. References: CVE-2018-12538.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2025-12-03 · updated · rule 200020003
  > Updated: signature 200020003 "Jetty FileBasedSessionStore Session Stealing" (Session Hijacking, risk Medium), systems: Jetty. References: CVE-2018-12538.
  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-2018-12538 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2018-12538