CVE-2026-15782Network attack vector

Stored XSS via unescaped OptinMonster site key

Published Jul 21, 2026 · Updated Jul 21, 2026

Stored XSS in WPForms Lite 2.0.0.1 and earlier allows remote authenticated users to execute scripts through OptinMonster campaign markup. The frontend integration processes an attacker-controlled data-sitekey attribute from post content without sufficient input sanitization or output escaping. Contributor-level access and an active inline OptinMonster campaign emitting matching #om-{id} markup are required; scripts run when the affected page is accessed.

CVSS severity4.9
Medium
EPSS probability0.29%
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 WPForms Lite 2.0.0.1 and earlier allows remote authenticated users to execute scripts through OptinMonster campaign markup. The frontend integration processes an attacker-controlled data-sitekey attribute from post content without sufficient input sanitization or output escaping. Contributor-level access and an active inline OptinMonster campaign emitting matching #om-{id} markup are required; scripts run when the affected page is accessed.

The record

CVE
CVE-2026-15782
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
WPForms
Product
WPForms
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 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 <=2.0.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WPForms · WPFormsversion=0 <=2.0.0.1

Published CVSS scores

4.9WordfenceCVSS:3.1/AV:N/AC:H/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')
T1059.007JavaScript/JScript

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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