Is CVE-2009-0580 actively exploited?

CVE-2009-0580 has no public evidence of in-the-wild exploitation as of 2026-04-23.

What is the CVSS score for CVE-2009-0580?

CVE-2009-0580 has a CVSS score of 4.3 (UNKNOWN severity). Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N.

How do I patch CVE-2009-0580?

Patch guidance is available from apache security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2009-0580.

CVE-2009-0580 - remediation guidance & executive summary

Q: Which products are affected by CVE-2009-0580?

87 products: apache tomcat, apache tomcat, apache tomcat, apache tomcat, apache tomcat, and 82 more.

Description

Apache Tomcat 4.1.0 through 4.1.39, 5.5.0 through 5.5.27, and 6.0.0 through 6.0.18, when FORM authentication is used, allows remote attackers to enumerate valid usernames via requests to /j_security_check with malformed URL encoding of passwords, related to improper error checking in the (1) MemoryRealm, (2) DataSourceRealm, and (3) JDBCRealm authentication realms, as demonstrated by a % (percent) value for the j_password parameter.

CVSS Metrics

Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N
Access Vector: network
Access Cmplx: medium
Auth: none
Confidentiality: partial
Integrity: none
Availability: none
Weaknesses: CWE-200 · Information Disclosure

Metadata

Primary Vendor: APACHE
Published: 6/5/2009
Last Modified: 4/23/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

apache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcatapache : tomcat

Remediation Guidance

Executive Summary

View on NIST NVD