CVE-2018-12538

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.

Published: 2018-06-22 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-12538 is rated High Risk (66.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.69%). EPSS rose +2.15% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-12538

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.54% 2.69% +2.15%
2 2025-12-28 0.60% 0.54% -0.05%
3 2025-12-27 — 0.60% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-12538

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
6.5 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 6.4 [email protected]

Weakness enumeration for CVE-2018-12538

GitHub Security Advisory for CVE-2018-12538

GHSA-mwcx-532g-8pq3 · Severity: high · Ecosystem: maven — Access and integrity issue within Eclipse Jetty

OS Trackers for CVE-2018-12538

vendor priority summary link
debian unimportant CVE-2018-12538 unimportant priority: Debian including 1 source packages (jetty9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-12538
redhat medium — https://access.redhat.com/security/cve/CVE-2018-12538
ubuntu medium CVE-2018-12538 medium priority: Ubuntu including 2 source packages (jetty, jetty9), 10 status rows across 5 suites (artful, bionic, trusty, upstream, xenial): not-affected 6, DNE 3, ignored 1. https://ubuntu.com/security/CVE-2018-12538

Affected software / configurations for CVE-2018-12538

Vendor Product Version Raw CPE
eclipse jetty >= 9.4.0, <= 9.4.8 cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:*
netapp e-series_santricity_management_plug-ins — cpe:2.3:a:netapp:e-series_santricity_management_plug-ins:-:*:*:*:*:*:*:*
netapp e-series_santricity_os_controller >= 11.0, <= 11.40 cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*
netapp e-series_santricity_web_services_proxy — cpe:2.3:a:netapp:e-series_santricity_web_services_proxy:-:*:*:*:*:*:*:*
netapp element_software — cpe:2.3:a:netapp:element_software:-:*:*:*:*:*:*:*
netapp hyper_converged_infrastructure — cpe:2.3:a:netapp:hyper_converged_infrastructure:-:*:*:*:*:*:*:*
netapp oncommand_system_manager >= 3.0.0, <= 3.1.3 cpe:2.3:a:netapp:oncommand_system_manager:*:*:*:*:*:*:*:*
netapp oncommand_unified_manager — cpe:2.3:a:netapp:oncommand_unified_manager:-:*:*:*:*:*:*:*
netapp santricity_cloud_connector — cpe:2.3:a:netapp:santricity_cloud_connector:-:*:*:*:*:*:*:*
netapp snap_creator_framework — cpe:2.3:a:netapp:snap_creator_framework:-:*:*:*:*:*:*:*
netapp snapcenter — cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*
netapp snapmanager — cpe:2.3:a:netapp:snapmanager:-:*:*:*:*:*:*:*

References for CVE-2018-12538

cvelogic Threat Intelligence