CVE-2020-35936Network attack vector

Stored script execution via unsafe layout import

Published Jan 1, 2021 · Updated Aug 4, 2024

Stored XSS in PickPlugins Post Grid before 2.0.73 allows remote authenticated users to plant JavaScript through a crafted layout import. The post_grid_import_xml_layouts AJAX handler fetches a URL from source, decodes the returned layout, and stores attacker-controlled custom_scripts content without neutralizing embedded JavaScript. Subscriber-level access is sufficient, and the script executes when an administrator edits the imported layout or a visitor opens a page that uses it.

CVSS severity8.0
High
EPSS probability1.65%
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 PickPlugins Post Grid before 2.0.73 allows remote authenticated users to plant JavaScript through a crafted layout import. The post_grid_import_xml_layouts AJAX handler fetches a URL from source, decodes the returned layout, and stores attacker-controlled custom_scripts content without neutralizing embedded JavaScript. Subscriber-level access is sufficient, and the script executes when an administrator edits the imported layout or a visitor opens a page that uses it.

The record

CVE
CVE-2020-35936
Published
Jan 1, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 1, 2021CVE 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

7.5MITRECVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
6.0NIST NVDAV:N/AC:M/Au:S/C:P/I:P/A:P
8.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

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')
T1190Exploit Public-Facing Application

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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