CVE-2022-27166Network attack vector

Reflected XSS via malformed HTML/XML conversion

Published Aug 4, 2022 · Updated Aug 3, 2024

Reflected XSS in Apache JSPWiki 2.11.2 and earlier allows remote attackers to execute JavaScript through a crafted XHRHtml2Markup.jsp request. XHRHtml2Markup.jsp passes malformed attacker-supplied HTML/XML through its conversion path without sufficient protection, allowing executable markup in the generated output. Exploitation requires a victim to open the crafted request; script execution occurs in the victim's browser and can expose sensitive information or alter page content.

CVSS severity6.1
Medium
EPSS probability85.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Apache JSPWiki 2.11.2 and earlier allows remote attackers to execute JavaScript through a crafted XHRHtml2Markup.jsp request. XHRHtml2Markup.jsp passes malformed attacker-supplied HTML/XML through its conversion path without sufficient protection, allowing executable markup in the generated output. Exploitation requires a victim to open the crafted request; script execution occurs in the victim's browser and can expose sensitive information or alter page content.

The record

CVE
CVE-2022-27166
Published
Aug 4, 2022
Updated
Aug 3, 2024
Vendor
The Apache Software Foundation
Product
Apache JSPWiki
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Apache JSPWiki <=Apache JSPWiki up to 2.11.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache JSPWikiversion=Apache JSPWiki <=Apache JSPWiki up to 2.11.2

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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