Auth bypass in Apache Shiro
CVE-2020-17523
Apache Shiro before 1.7.1, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.859 (99.7th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.859 · newest: 0.859 · change: 0.000
Affected products
- Apache Shiro
- Apache Shiro — versions before 1.7.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread.html/rce5943430a6136d37a1f2fc201d245fe094e2727a0bc27e3b… (Mailing List, Vendor Advisory)
- lists.apache.org/thread.html/r5b93ddf97e2c4cda779d22fab30539bdec454cfa5baec4ad0… (mailing-list)
- lists.apache.org/thread.html/rd4b613e121438b97e3eb263cac3137caddb1dbd8f648b73a4… (mailing-list)
- lists.apache.org/thread.html/r9d93dfb5df016b1a71a808486bc8f9fbafebbdbc8533625f9… (mailing-list)
- lists.apache.org/thread.html/re25b8317b00a50272a7252c4552cf1a81a97984cc2111ef77… (mailing-list)
- lists.apache.org/thread.html/r679ca97813384bdb1a4c087810ba44d9ad9c7c11583979bb7… (mailing-list)
- lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d… (mailing-list)
- lists.apache.org/thread.html/r852971e28f54cafa7d325bd7033115c67d613b112a2a10768… (mailing-list)
Frequently asked questions
- What is CVE-2020-17523?
- CVE-2020-17523 is a critical-severity vulnerability in Apache Shiro, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-02-03.
- How severe is CVE-2020-17523?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-17523 known to be exploited?
- 29 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.