How severe is CVE-2023-41080?

CVE-2023-41080 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2023-41080?

CVE-2023-41080 affects the following packages: org.apache.tomcat:tomcat (Maven), org.apache.tomcat:tomcat (Maven), org.apache.tomcat:tomcat (Maven), org.apache.tomcat:tomcat (Maven), org.apache.tomcat.embed:tomcat-embed-core (Maven), org.apache.tomcat.embed:tomcat-embed-core (Maven), org.apache.tomcat.embed:tomcat-embed-core (Maven), org.apache.tomcat.embed:tomcat-embed-core (Maven), and 3 more. Ecosystems affected: Maven.

How do I fix CVE-2023-41080?

Update org.apache.tomcat:tomcat to 11.0.0-M11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-41080 is resolved across your whole dependency graph.

How do I detect CVE-2023-41080 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-2023-41080 if there is no patch (or I can't update yet)?

Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.

Is CVE-2023-41080 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2023-41080, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2023-41080?

CVE-2023-41080 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-2023-41080?

CVE-2023-41080 is classified as Open Redirect (CWE-601). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2023-41080 published, and has it been updated?

CVE-2023-41080 was published on August 25, 2023 and was last updated on October 28, 2026. 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

MEDIUM severity

CVE-2023-41080 — tomcat

MEDIUMFix: apache/tomcat@4998ad7

CVE-2023-41080 is a medium-severity (CVSS 6.1) Open Redirect vulnerability in org.apache.tomcat:tomcat. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for org.apache.tomcat:tomcat — see the affected versions and patch details below.

Apache Tomcat: Open redirect with FORM authentication

Also known asBIT-tomcat-2023-41080GHSA-q3mw-pvr8-9ggc

Published

Aug 25, 2023

Updated

Oct 28, 2026

Affected

11 pkgs

Patched

11 / 11

Exploits

2 known

Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-41080.

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.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

11 pkgs affected

☕org.apache.tomcat:tomcat☕org.apache.tomcat:tomcat☕org.apache.tomcat:tomcat☕org.apache.tomcat:tomcat☕org.apache.tomcat.embed:tomcat-embed-core☕org.apache.tomcat.embed:tomcat-embed-core☕org.apache.tomcat.embed:tomcat-embed-core☕org.apache.tomcat.embed:tomcat-embed-core+3 more

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

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in FORM authentication feature Apache Tomcat.This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M10, from 10.1.0-M1 through 10.0.12, from 9.0.0-M1 through 9.0.79 and from 8.5.0 through 8.5.92. Older, EOL versions may also be affected.

The vulnerability is limited to the ROOT (default) web application.

Affected Packages

11 total 11 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.tomcat:tomcat`	≥ 11.0.0-M1&&< 11.0.0-M11	11.0.0-M11`org.apache.tomcat:tomcat:11.0.0-M11`
☕Maven	`org.apache.tomcat:tomcat`	≥ 10.1.0-M1&&< 10.1.13	10.1.13`org.apache.tomcat:tomcat:10.1.13`
☕Maven	`org.apache.tomcat:tomcat`	≥ 9.0.0-M1&&< 9.0.80	9.0.80`org.apache.tomcat:tomcat:9.0.80`
☕Maven	`org.apache.tomcat:tomcat`	≥ 8.5.0&&< 8.5.93	8.5.93`org.apache.tomcat:tomcat:8.5.93`
☕Maven	`org.apache.tomcat.embed:tomcat-embed-core`	≥ 8.5.0&&< 8.5.93	8.5.93`org.apache.tomcat.embed:tomcat-embed-core:8.5.93`
☕Maven	`org.apache.tomcat.embed:tomcat-embed-core`	≥ 9.0.0-M1&&< 9.0.80	9.0.80`org.apache.tomcat.embed:tomcat-embed-core:9.0.80`

Affected Products

2 products · 15 configurations

Application

tomcatapache

≥ 10.1.0 && ≤ 10.1.12

1 version

11.0.0

debian linuxdebian

2 versions

10.011.0

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in FOR…

github.comGithubAug 2023

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 11.0.0-M11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-41080 is resolved across your whole dependency graph.
Workarounds
Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.

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

The pki-servlet-engine package has been obsoleted by the Tomcat package. Therefore, this issue will be fixed in the Tomcat package rather than the pki-serlvet-engine package. Please follow the RHEL Tomcat trackers instead for the updates. Red Hat Satellite is not directly impacted by this issue, since it does not…

Product	Fixed in	Advisory
JWS 6.0.1	`tomcat`	RHSA-2024:1325
Red Hat AMQ Broker 7	`tomcat`	RHSA-2023:5946
Red Hat AMQ Streams 2.6.0	`tomcat`	RHSA-2023:7678
Red Hat Enterprise Linux 10	`tomcat-1:10.1.36-1.el10_0`	RHSA-2025:7497
Red Hat Enterprise Linux 8	`tomcat-1:9.0.62-27.el8_9.2`	RHSA-2024:0125
Red Hat Enterprise Linux 8.8 Extended Update Support	`tomcat-1:9.0.87-1.el8_8.2`	RHSA-2024:3814
Red Hat Enterprise Linux 9	`tomcat-1:9.0.62-37.el9_3.1`	RHSA-2024:0474
Red Hat JBoss Web Server 5	see advisory	RHSA-2023:7623

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2023-41080 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.1/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE Classification

CWE-601Open Redirect

Weaponization

No Nuclei template or Metasploit module yet. 2 public proof-of-concept references are listed on this page.

Timeline

Disclosed

Aug 25, 2023

First exploit

Aug 26, 2023

1 day after disclosure — rapid exploitation

Last updated

Oct 28, 2026

Identifiers

CVE-2023-41080

GHSA-q3mw-pvr8-9ggc

BIT-tomcat-2023-41080

References

Advisorygithub.com · CVE 2023 41080.json Advisorylists.apache.org · 71wvwprtx2j2m54fovq9zr7gbm2wow2f Advisorynvd.nist.gov · CVE 2023 41080 Advisorysecurity.netapp.com · ntap 20230921 0006 Advisorydebian.org · dsa 5521 Advisorydebian.org · dsa 5522 Weblists.debian.org · msg00020 Webgithub.com · 4998ad745b67edeadefe541c94ed029b53933d3b Webgithub.com · 77c0ce2d169efa248b64b992e547aad549ec906b Webgithub.com · bb4624a9f3e69d495182ebfa68d7983076407a27 Webgithub.com · e3703c9abb8fe0d5602f6ba8a8f11d4b6940815a Websecurity.netapp.com · ntap 20230921 0006 Packagegithub.com · tomcat

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs affecting tomcat are rated as high or higher (top: critical).

CVE-2026-65905CVE-2026-65182CVE-2026-68525CVE-2026-55956CVE-2026-55957CVE-2026-55955CVE-2026-53404CVE-2026-55276

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 28, 2026