CVE-2026-0690Network attack vector

Stored XSS via unescaped rank_math_description metadata

Published Jan 20, 2026 · Updated Jan 20, 2026

Stored XSS in FlatPM – Ad Manager, AdSense and Custom Code 3.2.2 and earlier allows remote authenticated users to inject scripts. The plugin accepts the rank_math_description custom field without sufficient input sanitization and later renders the stored value without output escaping. Contributor-level access is sufficient, and the injected JavaScript runs in the browser of any user who opens the affected page.

CVSS severity6.4
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

Stored XSS in FlatPM – Ad Manager, AdSense and Custom Code 3.2.2 and earlier allows remote authenticated users to inject scripts. The plugin accepts the rank_math_description custom field without sufficient input sanitization and later renders the stored value without output escaping. Contributor-level access is sufficient, and the injected JavaScript runs in the browser of any user who opens the affected page.

The record

CVE
CVE-2026-0690
Published
Jan 20, 2026
Updated
Jan 20, 2026
Vendor
Mikhail Flat
Product
FlatPM – Ad Manager, AdSense and Custom Code
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 20, 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=* <=3.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mikhail Flat · FlatPM – Ad Manager, AdSense and Custom Codeversion=* <=3.2.2

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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