How severe is CVE-2011-5063?

No CVSS score has been assigned to CVE-2011-5063 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2011-5063?

CVE-2011-5063 affects the following packages: org.apache.tomcat:tomcat (Maven), org.apache.tomcat:tomcat (Maven), org.apache.tomcat:tomcat (Maven). Ecosystems affected: Maven.

How do I fix CVE-2011-5063?

Update org.apache.tomcat:tomcat to 5.5.34 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-5063 is resolved across your whole dependency graph.

How do I detect CVE-2011-5063 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.tomcat:tomcat, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2011-5063 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is CVE-2011-5063 actively exploited in the wild?

No public exploit code has been indexed for CVE-2011-5063 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2011-5063?

CVE-2011-5063 has an EPSS (Exploit Prediction Scoring System) score of 6.5%, placing it in the 94th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2011-5063?

CVE-2011-5063 is classified as Improper Authentication (CWE-287). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2011-5063 published, and has it been updated?

CVE-2011-5063 was published on May 14, 2022 and was last updated on February 21, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

Not in CISA KEV

CVE-2011-5063 — tomcat

Fix: apache/tomcat@639e209

CVE-2011-5063 is a Improper Authentication vulnerability in org.apache.tomcat:tomcat. A fix is available for org.apache.tomcat:tomcat — see the affected versions and patch details below.

Improper Authentication in Apache Tomcat

Published

May 14, 2022

Updated

Feb 21, 2024

Affected

3 pkgs

Patched

3 / 3

Exploits

None indexed

Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

6.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs94th percentile — riskier than 94% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

3 pkgs affected

☕org.apache.tomcat:tomcat☕org.apache.tomcat:tomcat☕org.apache.tomcat:tomcat

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

The HTTP Digest Access Authentication implementation in Apache Tomcat 5.5.x before 5.5.34, 6.x before 6.0.33, and 7.x before 7.0.12 does not check realm values, which might allow remote attackers to bypass intended access restrictions by leveraging the availability of a protection space with weaker authentication or authorization requirements, a different vulnerability than CVE-2011-1184.

Affected Packages

3 total 3 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.tomcat:tomcat`	≥ 5.5.0&&< 5.5.34	5.5.34`org.apache.tomcat:tomcat:5.5.34`
☕Maven	`org.apache.tomcat:tomcat`	≥ 6.0.0&&< 6.0.33	6.0.33`org.apache.tomcat:tomcat:6.0.33`
☕Maven	`org.apache.tomcat:tomcat`	≥ 7.0.0&&< 7.0.12	7.0.12`org.apache.tomcat:tomcat:7.0.12`

Affected Products

1 product · 77 configurations

Application

tomcatapache

76 versions

5.5.05.5.15.5.25.5.35.5.45.5.55.5.65.5.75.5.85.5.95.5.105.5.11

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.tomcat:tomcat, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.tomcat:tomcat to 5.5.34 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-5063 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Product	Fixed in	Advisory
JBEWP 5 for RHEL 5	`jbossweb-0:2.1.12-3_patch_03.2.ep5.el5`	RHSA-2012:0076
JBoss Communications Platform 5.1	see advisory	RHSA-2012:0078
JBoss Enterprise BRMS Platform 5.1	see advisory	RHSA-2012:0325
Red Hat Enterprise Linux 5	`tomcat5-0:5.5.23-0jpp.22.el5_7`	RHSA-2011:1845
Red Hat Enterprise Linux 6	`tomcat6-0:6.0.24-35.el6_1`	RHSA-2011:1780
Red Hat JBoss Enterprise Application Platform 4.3	see advisory	RHSA-2012:0041
Red Hat JBoss Enterprise Application Platform 5.1	see advisory	RHSA-2012:0075
Red Hat JBoss Enterprise Application Platform 5 for RHEL 5	`jbossweb-0:2.1.12-3_patch_03.2.ep5.el5`	RHSA-2012:0074

Frequently Asked Questions

O3 Security · Impact-Aware SCA

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