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CVE-2009-2901

20
FAUCET Score

CVE-2009-2901 describes a vulnerability in Apache Tomcat versions 5.5.0 through 5.5.28 and 6.0.0 through 6.0.20, where the autodeployment process can redeploy residual application files after a failed undeploy operation. This flaw, when autoDeploy is enabled, could allow unauthenticated remote attackers to bypass intended authentication and access these partially deployed applications via HTTP requests. The vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and potential for partial confidentiality impact, but no integrity or availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5.5.0CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:5.5.0:*:*:*:*:*:*:*
5.5.1CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:5.5.1:*:*:*:*:*:*:*
5.5.2CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:5.5.2:*:*:*:*:*:*:*
5.5.3CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:5.5.3:*:*:*:*:*:*:*
5.5.4CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:5.5.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
8.15%
Probability of exploitation in next 30 days
EPSS Percentile
94.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0815 is in the 93rd percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

mavenpatch availablevia ghsa
Product: org.apache.tomcat:tomcatFixed in: 5.5.29
mavenpatch availablevia ghsa
Product: org.apache.tomcat:tomcatFixed in: 6.0.24

Vendor Advisories (2)

mavenGHSA-hjfh-7c4v-7q8hmedium

Improper Authentication in Apache Tomcat

May 2, 2022
redhatCVE-2009-2901Low

tomcat: insecure partial deploy after failed undeploy

Jan 24, 2010

References

lists.apple.com / archives/security-announce/2010//Mar/msg00001.html
lists.opensuse.org / opensuse-security-announce/2010-04/msg00001.html
lists.opensuse.org / opensuse-updates/2012-12/msg00089.html
lists.opensuse.org / opensuse-updates/2012-12/msg00090.html
lists.opensuse.org / opensuse-updates/2013-01/msg00037.html
marc.info
marc.info
marc.info
secunia.com / advisories/38316
Vendor Advisory
secunia.com / advisories/38346
Vendor Advisory
secunia.com / advisories/38541
secunia.com / advisories/39317
secunia.com / advisories/43310
secunia.com / advisories/57126
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/55856
lists.apache.org / thread.html/06cfb634bc7bf37af7d8f760f118018746ad8efbd519c4b789ac9c2e%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/8dcaf7c3894d66cb717646ea1504ea6e300021c85bb4e677dc16b1aa%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/r3aacc40356defc3f248aa504b1e48e819dd0471a0a83349080c6bcbf%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/r584a714f141eff7b1c358d4679288177bd4ca4558e9999d15867d4b5%40%3Cdev.tomcat.apache.org%3E
support.apple.com / kb/HT4077
svn.apache.org / viewvc
Patch
svn.apache.org / viewvc
Patch
tomcat.apache.org / security-5.html
PatchVendor Advisory
tomcat.apache.org / security-6.html
PatchVendor Advisory
ubuntu.com / usn/usn-899-1
mandriva.com / security/advisories
mandriva.com / security/advisories
securityfocus.com / archive/1/509151/100/0/threaded
securityfocus.com / archive/1/516397/100/0/threaded
securityfocus.com / bid/37942
vmware.com / security/advisories/VMSA-2011-0003.html
vmware.com / support/vsphere4/doc/vsp_vc41_u1_rel_notes.html
vupen.com / english/advisories/2010/0213
PatchVendor Advisory