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CVE-2009-0580· NVD / CVE Program· CNA redhat

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 attacker

Noroxi assessment

Priority: Plan (action score 45/100)

  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 94.4% (FIRST EPSS); higher than 99.8% of all records.
  • Fixed version: tomcat5.5 (Debian:5.0) 5.5.26-5lenny2; org.apache.tomcat:tomcat (Maven) 4.1.40, 5.5.28, 6.0.19; tomcat5-jsp-2.0-api (Red Hat:enterprise_linux:5::client) 0:5.5.23-0jpp.7.el5_3.2.

Add it to your regular patch cycle. Upgrade to tomcat5.5 (Debian:5.0) 5.5.26-5lenny2; org.apache.tomcat:tomcat (Maven) 4.1.40, 5.5.28, 6.0.19; tomcat5-jsp-2.0-api (Red Hat:enterprise_linux:5::client) 0:5.5.23-0jpp.7.el5_3.2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 4.3 · v2.0—Weaponized Fix available
Published
Jun 5, 2009
Updated
Jun 16, 2026
EPSS
94.4% · 99th percentile

Report tools

JSON

Action score

45

Plan

Add it to your regular patch cycle.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
28 / 30 · 94.4%

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  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
apachetomcat

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apache tomcat4.1.0
  • apache tomcat4.1.1
  • apache tomcat4.1.10
  • apache tomcat4.1.11
  • apache tomcat4.1.12
  • apache tomcat4.1.13
  • apache tomcat4.1.14
  • apache tomcat4.1.15
  • apache tomcat4.1.16
  • apache tomcat4.1.17
  • apache tomcat4.1.18
  • apache tomcat4.1.19
  • apache tomcat4.1.2
  • apache tomcat4.1.20
  • apache tomcat4.1.21
  • apache tomcat4.1.22
  • apache tomcat4.1.23
  • apache tomcat4.1.24
  • apache tomcat4.1.25
  • apache tomcat4.1.26

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:5.0tomcat5.5before 5.5.26-5lenny25.5.26-5lenny2
Mavenorg.apache.tomcat:tomcatfrom 4.1.0 · before 4.1.404.1.40
Mavenorg.apache.tomcat:tomcatfrom 5.0.0 · before 5.5.285.5.28
Mavenorg.apache.tomcat:tomcatfrom 6.0.0 · before 6.0.196.0.19
Red Hat:enterprise_linux:5::clienttomcat5-jsp-2.0-apibefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::clienttomcat5-servlet-2.4-apibefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::client_workstationtomcat5before 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::client_workstationtomcat5-admin-webappsbefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::client_workstationtomcat5-common-libbefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::client_workstationtomcat5-debuginfobefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::client_workstationtomcat5-jasperbefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::client_workstationtomcat5-jasper-javadocbefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::client_workstationtomcat5-jsp-2.0-api-javadocbefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::client_workstationtomcat5-server-libbefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::client_workstationtomcat5-servlet-2.4-api-javadocbefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:enterprise_linux:5::client_workstationtomcat5-webappsbefore 0:5.5.23-0jpp.7.el5_3.20:5.5.23-0jpp.7.el5_3.2
Red Hat:jboss_enterprise_application_platform:4.2.0::el4hibernate3before 1:3.2.4-1.SP1_CP08.0jpp.ep1.2.el41:3.2.4-1.SP1_CP08.0jpp.ep1.2.el4
Red Hat:jboss_enterprise_application_platform:4.2.0::el4hibernate3-annotationsbefore 0:3.3.1-1.10.GA_CP01.ep1.el40:3.3.1-1.10.GA_CP01.ep1.el4
Red Hat:jboss_enterprise_application_platform:4.2.0::el4hibernate3-annotations-javadocbefore 0:3.3.1-1.10.GA_CP01.ep1.el40:3.3.1-1.10.GA_CP01.ep1.el4
Red Hat:jboss_enterprise_application_platform:4.2.0::el4hibernate3-commons-annotationsbefore 0:3.0.0-1jpp.ep1.5.el40:3.0.0-1jpp.ep1.5.el4
Red Hat:jboss_enterprise_application_platform:4.2.0::el4hibernate3-commons-annotations-javadocbefore 0:3.0.0-1jpp.ep1.5.el40:3.0.0-1jpp.ep1.5.el4
Red Hat:jboss_enterprise_application_platform:4.2.0::el4hibernate3-entitymanagerbefore 0:3.3.2-2.4.ep1.el40:3.3.2-2.4.ep1.el4
Red Hat:jboss_enterprise_application_platform:4.2.0::el4hibernate3-entitymanager-javadocbefore 0:3.3.2-2.4.ep1.el40:3.3.2-2.4.ep1.el4
Red Hat:jboss_enterprise_application_platform:4.2.0::el4hibernate3-javadocbefore 1:3.2.4-1.SP1_CP08.0jpp.ep1.2.el41:3.2.4-1.SP1_CP08.0jpp.ep1.2.el4

+96

Same product

apache: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-24813Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUTKEV
    99Now
  • CVE-2016-8735Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39, 8.5.x before 8.5.7, and 9.x beforeKEV
    96Now
  • CVE-2017-12617When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g.KEV
    92Now

Published before and after this one in the same product

  • ← EarlierCVE-2009-0781Mar 9, 2009 · Cross-site scripting (XSS) vulnerability in jsp/cal/cal2.jsp in the calendar application in the examples web application in Apache Tomcat 4.
    20Monitor
  • ← EarlierCVE-2009-0033Jun 5, 2009 · 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 the Java AJP connector and mod_jk load balancing ar
    23Monitor
  • Later →CVE-2009-0783Jun 5, 2009 · Apache Tomcat 4.1.0 through 4.1.39, 5.5.0 through 5.5.27, and 6.0.0 through 6.0.18 permits web applications to replace an XML parser used fo
    16Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:tomcat5.55.5.26-5lenny2 · Debian:5.0Package registry (OSV)
Maven:org.apache.tomcat:tomcat4.1.40Package registry (OSV)
Maven:org.apache.tomcat:tomcat5.5.28Package registry (OSV)
Maven:org.apache.tomcat:tomcat6.0.19Package registry (OSV)
red hat:hibernate31:3.2.4-1.SP1_CP08.0jpp.ep1.2.3.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:hibernate3-annotations0:3.3.1-1.10.1GA_CP01.ep1.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:hibernate3-annotations-javadoc0:3.3.1-1.10.1GA_CP01.ep1.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:hibernate3-commons-annotations0:3.0.0-1jpp.ep1.5.2.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:hibernate3-commons-annotations-javadoc0:3.0.0-1jpp.ep1.5.2.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:hibernate3-entitymanager0:3.3.2-2.4.1.ep1.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:hibernate3-entitymanager-javadoc0:3.3.2-2.4.1.ep1.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:hibernate3-javadoc1:3.2.4-1.SP1_CP08.0jpp.ep1.2.3.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:hibernate3-validator0:3.0.0-1jpp.ep1.8.3.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:hibernate3-validator-javadoc0:3.0.0-1jpp.ep1.8.3.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:jakarta-slide-webdavclient0:2.1-9.2.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)
red hat:jboss-cache0:1.4.1-6.SP13.1.ep1.el5 · Red Hat:jboss_enterprise_application_platform:4.2.0::el5Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2009-06-03
Metasploit moduleauxiliary/scanner/http/tomcat_enumApache Tomcat User Enumerationauxiliary—

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-3 d
  2. Published
  3. TodayOct 25, 2026+6351 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    P · data can be read
    Integrity
    none
    Availability
    none
    Attack complexity
    M
    Confidentiality impact
    P
    Integrity impact
    None
    Availability impact
    None

    Weakness class (CWE)

    CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

    CVSS vector

    AV:N/AC:M/Au:N/C:P/I:N/A:N

    nvd-primary

    Root cause

    The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

    The bug in code

    The whole CWE-200 class

    A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

    Vulnerable

    json
    {  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

    Fixed

    json
    {  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    Change log

    1. Fix✗ → ✓

    For records you follow, these changes also arrive as notifications. →

    References

    Show all references (19 more)

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records