Which products and versions are affected by CVE-2009-0580?

Affected: Tomcat (Apache) versions 4.1.0, 4.1.1, 4.1.10, 4.1.11, 4.1.12, 4.1.13, 4.1.14, 4.1.15; tomcat5.5 (debian); org.apache.tomcat:tomcat (maven) versions >= 4.1.0, among others. The full list is in the CVE brief.

Is CVE-2009-0580 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2009-0580 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2009-0580?

Public exploit code is available.

Is there a fix for CVE-2009-0580?

Fixed versions are available, including ant 0:1.6.5-1jpp_1rh, avalon-logkit 0:1.2-2jpp_4rh, axis 0:1.2.1-1jpp_3rh.

How urgently should CVE-2009-0580 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2009-0580

MediumPublic exploit

Exposure of Sensitive Information in Apache Tomcat

Published May 2, 2022 · Updated Mar 9, 2026 · Also known as GHSA-w227-xcfx-3pj8

Key Facts

Patch immediately

CVE-2009-0580 is a medium-severity vulnerability (CVSS 4.3 v2) affecting Tomcat (Apache), tomcat5.5 (debian), org.apache.tomcat:tomcat (maven) and 22 more products.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 94% probability of exploitation in the next 30 days.
Fixed versions are available, including ant 0:1.6.5-1jpp_1rh, avalon-logkit 0:1.2-2jpp_4rh, axis 0:1.2.1-1jpp_3rh.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

4.3

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

EPSS (30-day exploit likelihood)

94%

Higher than 99.8% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2009-0580 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Affected Products

166 affected entries in total

Product	Affected versions	Fixed in
TomcatApache	4.1.0, 4.1.1, 4.1.10, 4.1.11, 4.1.12, 4.1.13, 4.1.14, 4.1.15	n/a
tomcat5.5debian	See advisory	5.5.26-5lenny2
org.apache.tomcat:tomcatmaven	>= 4.1.0	6.0.19
tomcat5-admin-webappsoracle	See advisory	5.5.23-0jpp.7.el5_3.2
tomcat5-common-liboracle	See advisory	5.5.23-0jpp.7.el5_3.2

20 more affected products in the full CVE brief

Patched Releases

ant

0:1.6.5-1jpp_1rh

avalon-logkit

0:1.2-2jpp_4rh

axis

0:1.2.1-1jpp_3rh

classpathx-jaf

0:1.0-2jpp_6rh

classpathx-mail

0:1.1.1-2jpp_8rh

geronimo-specs

0:1.0-0.M4.1jpp_10rh

glassfish-jaxb

0:2.1.4-1.11.1.ep1.el5, 0:2.1.4-1.11.ep1.el4

hibernate3

1:3.2.4-1.SP1_CP08.0jpp.ep1.2.3.el5, 1:3.2.4-1.SP1_CP08.0jpp.ep1.2.el4

hibernate3-annotations

0:3.3.1-1.10.1GA_CP01.ep1.el5, 0:3.3.1-1.10.GA_CP01.ep1.el4

hibernate3-commons-annotations

0:3.0.0-1jpp.ep1.5.2.el5, 0:3.0.0-1jpp.ep1.5.el4

hibernate3-entitymanager

0:3.3.2-2.4.1.ep1.el5, 0:3.3.2-2.4.ep1.el4

hibernate3-validator

0:3.0.0-1jpp.ep1.8.3.el5, 0:3.0.0-1jpp.ep1.8.el4

hsqldb

1:1.8.0.8-2.patch02.1jpp.ep1.2.el4

jakarta-commons-modeler

0:2.0-3jpp_2rh

jakarta-slide-webdavclient

0:2.1-9.2.el4, 0:2.1-9.2.el5

jboss-cache

0:1.4.1-6.SP13.1.ep1.el4, 0:1.4.1-6.SP13.1.ep1.el5

jboss-messaging

0:1.4.0-2.SP3_CP08.1.ep1.el4, 0:1.4.0-2.SP3_CP08.1.ep1.el5

jboss-remoting

0:2.2.3-2.ep1.el4, 0:2.2.3-2.ep1.el5

jboss-seam

0:1.2.1-1.ep1.13.el5, 0:1.2.1-3.JBPAPP_4_3_0_GA.ep1.15.el4

jbossas

0:4.2.0-4.GA_CP07.5.1.ep1.el5, 0:4.2.0-4.GA_CP07.5.ep1.el4

jbossts

1:4.2.3-1.SP5_CP05.1jpp.ep1.1.el4, 1:4.2.3-1.SP5_CP05.1jpp.ep1.1.el5

jbossweb

0:2.0.0-6.CP11.0jpp.ep1.1.el4, 0:2.0.0-6.CP11.0jpp.ep1.1.el5

jbossws

0:2.0.1-3.SP2_CP06.3.1.ep1.el5, 0:2.0.1-3.SP2_CP06.3.ep1.el4

jbossws-common

0:1.0.0-2.GA_CP04.1.ep1.el4, 0:1.0.0-2.GA_CP04.1.ep1.el5

jbossws-framework

0:2.0.1-1.GA_CP04.2.ep1.el4, 0:2.0.1-1.GA_CP04.2.ep1.el5

Timeline

Publicly disclosed
May 2, 2022
Last updated
Mar 9, 2026

Weakness Type

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

15 more references in the full CVE brief

FAQ

Common Questions.

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) DataSourc…
Affected: Tomcat (Apache) versions 4.1.0, 4.1.1, 4.1.10, 4.1.11, 4.1.12, 4.1.13, 4.1.14, 4.1.15; tomcat5.5 (debian); org.apache.tomcat:tomcat (maven) versions >= 4.1.0, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including ant 0:1.6.5-1jpp_1rh, avalon-logkit 0:1.2-2jpp_4rh, axis 0:1.2.1-1jpp_3rh.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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