CVE-2023-1239Public exploitNetwork attack vector

Script execution via unsanitized installation site name

Published Mar 7, 2023 · Updated Mar 6, 2025

Reflected XSS in Apache Answer before 1.0.6 allows remote authenticated users to run script in another user's browser via a crafted site name. The installation request model accepted SiteName without sanitizer validation, allowing attacker-controlled markup to reach a rendered page. Exploitation requires high-privileged access and a user to view the affected response; resulting script runs in that user's browser context.

CVSS severity4.8
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Reflected XSS in Apache Answer before 1.0.6 allows remote authenticated users to run script in another user's browser via a crafted site name. The installation request model accepted SiteName without sanitizer validation, allowing attacker-controlled markup to reach a rendered page. Exploitation requires high-privileged access and a user to view the affected response; resulting script runs in that user's browser context.

The record

CVE
CVE-2023-1239
Published
Mar 7, 2023
Updated
Mar 6, 2025
Vendor
The Apache Software Foundation
Product
Apache Answer
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <1.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Answerversion=unspecified <1.0.6

Published CVSS scores

6.0huntr.devCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo