CVE-2017-9804
In Apache Struts 2.3.7 through 2.3.33 and 2.5 through 2.5.12, if an application allows entering a URL in a form field and built-in URLValidator is used, it is possible to prepare a special URL which will be used to overload server process when…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (8.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In Apache Struts 2.3.7 through 2.3.33 and 2.5 through 2.5.12, if an application allows entering a URL in a form field and built-in URLValidator is used, it is possible to prepare a special URL which will be used to overload server process when performing validation of the URL. NOTE: this vulnerability exists because of an incomplete fix for S2-047 / CVE-2017-7672.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 8.24% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- apache/struts
- Source
- security@apache.org
EPSS 8.2% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-003.txtThird Party Advisory
- http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.htmlPatch, Third Party Advisory
- http://www.securityfocus.com/bid/100612Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039261Third Party Advisory, VDB Entry
- https://security.netapp.com/advisory/ntap-20180629-0001/
- https://struts.apache.org/docs/s2-050.htmlPatch, Vendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170907-struts2Third Party Advisory
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-003.txtThird Party Advisory
- http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.htmlPatch, Third Party Advisory
- http://www.securityfocus.com/bid/100612Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039261Third Party Advisory, VDB Entry
- https://security.netapp.com/advisory/ntap-20180629-0001/
- https://struts.apache.org/docs/s2-050.htmlPatch, Vendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170907-struts2Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.