How severe is CVE-2022-27166?

CVE-2022-27166 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-2022-27166?

CVE-2022-27166 affects the following packages: org.apache.jspwiki:jspwiki-main (Maven). Ecosystems affected: Maven.

How do I fix CVE-2022-27166?

Update org.apache.jspwiki:jspwiki-main to 2.11.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-27166 is resolved across your whole dependency graph.

How do I detect CVE-2022-27166 in my Maven dependencies?

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

How do I mitigate CVE-2022-27166 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2022-27166 actively exploited in the wild?

No public exploit code has been indexed for CVE-2022-27166 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-2022-27166?

CVE-2022-27166 has an EPSS (Exploit Prediction Scoring System) score of 86.2%, placing it in the 100th 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. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

What type of vulnerability is CVE-2022-27166?

CVE-2022-27166 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2022-27166 published, and has it been updated?

CVE-2022-27166 was published on August 4, 2022 and was last updated on October 24, 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-2022-27166 — jspwiki-main

MEDIUM

CVE-2022-27166 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in org.apache.jspwiki:jspwiki-main. EPSS puts its 30-day exploitation probability at 86.2% (100th percentile). A fix is available for org.apache.jspwiki:jspwiki-main — see the affected versions and patch details below.

XSS vulnerability on XHRHtml2Markup.jsp in JSPWiki 2.11.2

Also known asGHSA-2fxf-qj94-3f83

Published

Aug 4, 2022

Updated

Oct 24, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 25, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

86.2%probability of exploitation in next 30 days

Very High Risk+0.41%

Lower risk than most CVEs100th percentile — riskier than 100% 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

1 pkg affected

☕org.apache.jspwiki:jspwiki-main

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

A carefully crafted request on XHRHtml2Markup.jsp could trigger an XSS vulnerability on Apache JSPWiki up to and including 2.11.2, which could allow the attacker to execute javascript in the victim's browser and get some sensitive information about the victim. Version 2.11.3 contains a fix for the problem

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.jspwiki:jspwiki-main`	all versions	2.11.3`org.apache.jspwiki:jspwiki-main:2.11.3`

Affected Products

1 product · 1 configurations

Application

jspwikiapache

< 2.11.3

range

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.jspwiki:jspwiki-main, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.jspwiki:jspwiki-main to 2.11.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-27166 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2022-27166 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-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

Aug 4, 2022

Last updated

Oct 24, 2026

Identifiers

CVE-2022-27166

GHSA-2fxf-qj94-3f83

References

Advisorygithub.com · CVE 2022 27166.json Advisorynvd.nist.gov · CVE 2022 27166 Webjspwiki-wiki.apache.org · Wiki.jsp Packagegithub.com · jspwiki

Related vulnerabilities

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

CVE-2025-24854CVE-2025-24853CVE-2024-27136CVE-2022-46907CVE-2022-28731CVE-2022-28730CVE-2022-28732CVE-2022-34158

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026