CVE-2026-66702Public exploitNetwork attack vector

Administrator-context script execution via JavaScript string breakout

Published Aug 6, 2026 · Updated Aug 6, 2026

Reflected XSS in Rank Math SEO 1.0.274.1 and earlier allows remote attackers to execute script in an administrator's browser via a crafted URL. The inline_scripts method in the redirection debugger writes redirect_to into a single-quoted JavaScript assignment after URL sanitization but without JavaScript-context encoding. The Debug Redirections option must be enabled and an authenticated administrator must open the crafted URL, after which the script acts with that browser session's site privileges.

CVSS severity7.1
High
EPSS probability0.15%
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 Rank Math SEO 1.0.274.1 and earlier allows remote attackers to execute script in an administrator's browser via a crafted URL. The inline_scripts method in the redirection debugger writes redirect_to into a single-quoted JavaScript assignment after URL sanitization but without JavaScript-context encoding. The Debug Redirections option must be enabled and an authenticated administrator must open the crafted URL, after which the script acts with that browser session's site privileges.

The record

CVE
CVE-2026-66702
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Rank Math SEO
Product
Rank Math SEO
Classifications
CWE-79, CAPEC-591, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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=n/a <=1.0.274.1 changes=[{"at":"1.0.275","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rank Math SEO · Rank Math SEOversion=n/a <=1.0.274.1 changes=[{"at":"1.0.275","status":"unaffected"}]

Published CVSS scores

7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

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 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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1204.001User Execution: Malicious Link

Public exploit references

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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