CVE-2020-11508Network attack vector

Stored XSS via unchecked page-saving AJAX handler

Published Apr 7, 2020 · Updated Aug 4, 2024

Stored XSS in WP Lead Plus X through 0.98 allows remote authenticated users to inject JavaScript into WordPress pages via AJAX. The core37_lp_save_page handler parses the raw request body and passes attacker-controlled page fields to Page_Manager::save_page without capability or nonce checks. Subscriber-level access is sufficient to create pages or replace existing posts, causing the script to execute for later visitors and permitting redirects or data theft.

CVSS severity9.1
Critical
EPSS probability0.78%
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 WP Lead Plus X through 0.98 allows remote authenticated users to inject JavaScript into WordPress pages via AJAX. The core37_lp_save_page handler parses the raw request body and passes attacker-controlled page fields to Page_Manager::save_page without capability or nonce checks. Subscriber-level access is sufficient to create pages or replace existing posts, causing the script to execute for later visitors and permitting redirects or data theft.

The record

CVE
CVE-2020-11508
Published
Apr 7, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1WordfenceCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L

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

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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