CVE-2026-25688Network attack vector

Browser script execution via unsanitized AI answers

Published Jun 9, 2026 · Updated Jun 9, 2026

Stored cross-site scripting in Apache Answer 2.0.0 and earlier allows remote attackers to execute scripts when AI-generated answers are viewed. The AI-answer browser renderer passes model-generated response content into HTML rendering without neutralizing alternate XSS syntax. Exploitation requires malicious content to reach an AI-generated response and a user to view it, enabling script execution in that viewer's browser context.

CVSS severity6.1
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Apache Answer 2.0.0 and earlier allows remote attackers to execute scripts when AI-generated answers are viewed. The AI-answer browser renderer passes model-generated response content into HTML rendering without neutralizing alternate XSS syntax. Exploitation requires malicious content to reach an AI-generated response and a user to view it, enabling script execution in that viewer's browser context.

The record

CVE
CVE-2026-25688
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
The Apache Software Foundation
Product
Apache Answer
Classifications
CWE-87, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record 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=0 <=2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Answerversion=0 <=2.0.0

Published CVSS scores

6.1CISA-ADPCVSS: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-87Improper Neutralization of Alternate XSS Syntax
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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