CVE-2026-1667Network attack vector

Unauthenticated post creation and stored XSS via savePost

Published Jul 10, 2026 · Updated Jul 10, 2026

Stored cross-site scripting in Squirrly SEO 14.0.0 and earlier allows remote attackers to create posts and inject scripts via savePost(). The savePost() path accepts a leaked API token without authorization, then stores insufficiently sanitized content that is rendered without adequate escaping. Post creation requires no authentication; script injection additionally requires Advanced Custom Fields, and the payload runs when an injected page is viewed.

CVSS severity7.2
High
EPSS probability0.31%
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 Squirrly SEO 14.0.0 and earlier allows remote attackers to create posts and inject scripts via savePost(). The savePost() path accepts a leaked API token without authorization, then stores insufficiently sanitized content that is rendered without adequate escaping. Post creation requires no authentication; script injection additionally requires Advanced Custom Fields, and the payload runs when an injected page is viewed.

The record

CVE
CVE-2026-1667
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
Squirrly Limited
Product
Squirrly SEO
Classifications
CWE-862, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 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 <=14.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Squirrly Limited · Squirrly SEOversion=0 <=14.0.0

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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-862Missing Authorization
T1190Exploit Public-Facing Application

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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