CVE-2026-6711Network attack vector

Admin-session script execution via unescaped tab parameter

Published Apr 21, 2026 · Updated Apr 21, 2026

Reflected XSS in Website LLMs.txt 8.2.6 and earlier allows remote attackers to execute scripts through a crafted tab parameter. The plugin's admin page reads tab with filter_input() and inserts it into an HTML class attribute without sanitization or context-appropriate escaping. Exploitation requires an administrator to open the crafted URL, after which the script runs in that administrator's browser session.

CVSS severity6.1
Medium
EPSS probability0.21%
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 Website LLMs.txt 8.2.6 and earlier allows remote attackers to execute scripts through a crafted tab parameter. The plugin's admin page reads tab with filter_input() and inserts it into an HTML class attribute without sanitization or context-appropriate escaping. Exploitation requires an administrator to open the crafted URL, after which the script runs in that administrator's browser session.

The record

CVE
CVE-2026-6711
Published
Apr 21, 2026
Updated
Apr 21, 2026
Vendor
Ryan Howard
Product
Website LLMs.txt
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 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 <=8.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ryan Howard · Website LLMs.txtversion=0 <=8.2.6

Published CVSS scores

6.1WordfenceCVSS: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-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.

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Technologies

Your stack

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Your stack

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