CVE-2020-11509Public exploitNetwork attack vector

Administrator script execution via unchecked template import

Published Apr 7, 2020 · Updated Aug 4, 2024

Stored XSS in WP Lead Plus X 0.98 and earlier allows remote attackers to run JavaScript in an administrator's browser through a template upload. The c37_wpl_import_template admin-post handler exposes an unauthenticated action and passes uploaded file contents to Template_Manager::importTemplateFromString without nonce or capability checks. Execution requires a licensed site administrator to select the imported template when creating a page; the stored script then runs in that administrator session.

CVSS severity6.1
Medium
EPSS probability1.88%
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 0.98 and earlier allows remote attackers to run JavaScript in an administrator's browser through a template upload. The c37_wpl_import_template admin-post handler exposes an unauthenticated action and passes uploaded file contents to Template_Manager::importTemplateFromString without nonce or capability checks. Execution requires a licensed site administrator to select the imported template when creating a page; the stored script then runs in that administrator session.

The record

CVE
CVE-2020-11509
Published
Apr 7, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.1WordfenceCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
6.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST National Vulnerability DatabaseAV:N/AC:M/Au:N/C:N/I:P/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
Privilegesunauthenticated
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

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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