GHSA-v98j-7crc-wvrj · Severity: critical · Ecosystem: maven — Authentication bypass in Apache Shiro
Apache Shiro before 1.7.1, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.
Conclusion & alert: CVE-2020-17523 is rated High Risk (72.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 88.77%, 99th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: 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.
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 | 2025-11-21 | 89.88% | 88.77% | -1.11% |
| 2 | 2025-11-18 | 88.77% | 89.88% | +1.11% |
| 3 | 2025-04-22 | — | 88.77% | — |
Full EPSS history (18 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 9.0 | 2.0 | HIGH |
|
10.0 | 8.5 | [email protected] |
GHSA-v98j-7crc-wvrj · Severity: critical · Ecosystem: maven — Authentication bypass in Apache Shiro
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2020-17523 unimportant priority: Debian including 1 source packages (shiro), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. | https://security-tracker.debian.org/tracker/CVE-2020-17523 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2020-17523 |
ubuntu
|
medium | CVE-2020-17523 medium priority: Ubuntu including 1 source packages (shiro), 14 status rows across 14 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, trusty, upstream, xenial): ignored 6, not-affected 6, DNE 1, released 1. | https://ubuntu.com/security/CVE-2020-17523 |