CVE-2023-2836Public exploitNetwork attack vector

Stored XSS via unescaped form_id setting

Published May 31, 2023 · Updated Apr 8, 2026

Stored XSS in CRM Perks Forms 1.1.1 and earlier allows remote authenticated users to inject scripts through form settings. The settings page renders the form_id parameter without sufficient sanitization or output escaping, preserving attacker-supplied event-handler markup. Administrator access plus multisite or disabled unfiltered_html is required, and the stored script runs when a user opens the injected page.

CVSS severity4.4
Medium
EPSS probability0.60%
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 CRM Perks Forms 1.1.1 and earlier allows remote authenticated users to inject scripts through form settings. The settings page renders the form_id parameter without sufficient sanitization or output escaping, preserving attacker-supplied event-handler markup. Administrator access plus multisite or disabled unfiltered_html is required, and the stored script runs when a user opens the injected page.

The record

CVE
CVE-2023-2836
Published
May 31, 2023
Updated
Apr 8, 2026
Vendor
CRM Perks
Product
CRM Perks Forms – WordPress Form Builder
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=1.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

CRM Perks · CRM Perks Forms – WordPress Form Builderversion=0 <=1.1.1

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
4.8NIST NVDCVSS: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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

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

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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