CVE-2023-6941Public exploitNetwork attack vector

Stored XSS via unescaped plugin settings

Published Jan 15, 2024 · Updated Jun 20, 2025

Stored XSS in Keap Official Opt-in Forms 1.0.11 and earlier allows remote authenticated users to inject scripts through plugin settings. The plugin stores settings without sanitizing them and later renders their values without output escaping, but the published record does not name the fields. Administrator privileges and a victim viewing an affected page are required, and exposure remains when unfiltered_html is disabled, such as on multisite installations.

CVSS severity4.8
Medium
EPSS probability0.40%
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 Keap Official Opt-in Forms 1.0.11 and earlier allows remote authenticated users to inject scripts through plugin settings. The plugin stores settings without sanitizing them and later renders their values without output escaping, but the published record does not name the fields. Administrator privileges and a victim viewing an affected page are required, and exposure remains when unfiltered_html is disabled, such as on multisite installations.

The record

CVE
CVE-2023-6941
Published
Jan 15, 2024
Updated
Jun 20, 2025
Vendor
Keap
Product
Keap Official Opt-in Forms
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 2025Record 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 <=1.0.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Keap · Keap Official Opt-in Formsversion=0 <=1.0.11

Published CVSS scores

4.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript

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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