CVE-2020-35937Network attack vector

Stored XSS via unsanitized remote layout import

Published Jan 1, 2021 · Updated Aug 4, 2024

Stored XSS in PickPlugins Team Showcase before 1.22.16 allows remote authenticated users to store JavaScript through a crafted layout import. The team_import_xml_layouts AJAX handler fetches the source URL, decodes its payload, and stores attacker-controlled custom_css in custom_scripts without sanitization. A subscriber-level account suffices; the script runs when an administrator edits the layout or a visitor views a page using it, enabling browser-session compromise or site takeover.

CVSS severity7.5
High
EPSS probability1.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in PickPlugins Team Showcase before 1.22.16 allows remote authenticated users to store JavaScript through a crafted layout import. The team_import_xml_layouts AJAX handler fetches the source URL, decodes its payload, and stores attacker-controlled custom_css in custom_scripts without sanitization. A subscriber-level account suffices; the script runs when an administrator edits the layout or a visitor views a page using it, enabling browser-session compromise or site takeover.

The record

CVE
CVE-2020-35937
Published
Jan 1, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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/AC:H/AV:N/A:H/C:H/I:H/PR:L/S:U/UI:N
7.5WordfenceCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
6.0NIST National Vulnerability DatabaseAV:N/AC:M/Au:S/C:P/I:P/A:P

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')
T1203Exploitation for Client Execution

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo