CVE-2021-36829Network attack vector

Administrator-level script execution via undisclosed stored input

Published Sep 6, 2022 · Updated Apr 28, 2026

Stored XSS in MyThemeShop Launcher 1.0.11 and earlier allows remote authenticated users to execute scripts in another user's browser. Patchstack and MyThemeShop have not publicly identified the affected setting, request parameter, or missing output-encoding operation. Exploitation requires administrator privileges and a separate user to view the stored content, bounding impact to browser-context data access and modification.

CVSS severity4.8
Medium
EPSS probability0.58%
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 MyThemeShop Launcher 1.0.11 and earlier allows remote authenticated users to execute scripts in another user's browser. Patchstack and MyThemeShop have not publicly identified the affected setting, request parameter, or missing output-encoding operation. Exploitation requires administrator privileges and a separate user to view the stored content, bounding impact to browser-context data access and modification.

The record

CVE
CVE-2021-36829
Published
Sep 6, 2022
Updated
Apr 28, 2026
Vendor
MyThemeShop
Product
Launcher: Coming Soon & Maintenance Mode
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 6, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 1.0.11 <=1.0.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

MyThemeShop · Launcher: Coming Soon & Maintenance Modeversion=<= 1.0.11 <=1.0.11

Published CVSS scores

4.8PatchstackCVSS: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 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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