CVE-2023-34478 | Apache Shiro before 1.12.0, or 2.0.0-alpha-3, may be susceptible to a path traversal attack when used together with APIs or other web frameworks that route requests based on non-normalized requests.

Apache Shiro, before 1.12.0 or 2.0.0-alpha-3, may be susceptible to a path traversal attack that results in an authentication bypass when used together with APIs or other web frameworks that route requests based on non-normalized requests. Mitigation: Update to Apache Shiro 1.12.0+ or 2.0.0-alpha-3+

Published: 2023-07-24 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-34478 is rated High Risk (65.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.53%). EPSS rose +1.48% 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-2023-34478

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 0.05% 1.53% +1.48%
2 2026-05-20 0.04% 0.05% +0.01%
3 2025-11-21 — 0.04% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-34478

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/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:N)
No account or special rights needed—anonymous or random user is enough.
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.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/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:N)
No account or special rights needed—anonymous or random user is enough.
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.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-34478

GitHub Security Advisory for CVE-2023-34478

GHSA-pmhc-2g4f-85cg · Severity: critical · Ecosystem: maven — Path Traversal in Apache Shiro

OS Trackers for CVE-2023-34478

vendor priority summary link
debian not yet assigned CVE-2023-34478 not yet assigned priority: Debian including 1 source packages (shiro), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): open 4. https://security-tracker.debian.org/tracker/CVE-2023-34478
ubuntu medium CVE-2023-34478 medium priority: Ubuntu including 1 source packages (shiro), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 7, released 5. https://ubuntu.com/security/CVE-2023-34478

Affected software / configurations for CVE-2023-34478

Vendor Product Version Raw CPE
apache shiro < 1.12.0 cpe:2.3:a:apache:shiro:*:*:*:*:*:*:*:*
apache shiro 2.0.0 cpe:2.3:a:apache:shiro:2.0.0:alpha1:*:*:*:*:*:*
apache shiro 2.0.0 cpe:2.3:a:apache:shiro:2.0.0:alpha2:*:*:*:*:*:*

References for CVE-2023-34478

cvelogic Threat Intelligence