CVE-2016-4465
The URLValidator class in Apache Struts 2 2.3.20 through 2.3.28.1 and 2.5.x before 2.5.1 allows remote attackers to cause a denial of service via a null value for a URL field.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 10.4%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
The URLValidator class in Apache Struts 2 2.3.20 through 2.3.28.1 and 2.5.x before 2.5.1 allows remote attackers to cause a denial of service via a null value for a URL field.
- CVSS 3.0
- 5.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 10.37% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- apache/struts
- Source
- secalert@redhat.com
EPSS moved from 8.9% on 21 September 2026 to 10.4% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://jvn.jp/en/jp/JVN12352818/index.htmlVendor Advisory
- http://jvndb.jvn.jp/jvndb/JVNDB-2016-000114VDB Entry, Vendor Advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21987854Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
- http://www.securityfocus.com/bid/91278
- https://bugzilla.redhat.com/show_bug.cgi?id=1348253Issue Tracking
- https://struts.apache.org/docs/s2-041.htmlVendor Advisory
- http://jvn.jp/en/jp/JVN12352818/index.htmlVendor Advisory
- http://jvndb.jvn.jp/jvndb/JVNDB-2016-000114VDB Entry, Vendor Advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21987854Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
- http://www.securityfocus.com/bid/91278
- https://bugzilla.redhat.com/show_bug.cgi?id=1348253Issue Tracking
- https://struts.apache.org/docs/s2-041.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.