What is CVE-2021-36829?

CVE-2021-36829 is a medium-severity vulnerability in Mythemeshop Launcher, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2022-09-06.

How severe is CVE-2021-36829?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Is CVE-2021-36829 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Mythemeshop Launcher

CVE-2021-36829

Authenticated (admin+) Stored Cross-Site Scripting (XSS) vulnerability in MyThemeShop Launcher: Coming Soon & Maintenance Mode plugin <= 1.0.11 at WordPress.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-09-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001

Affected products

Mythemeshop Launcher
Mythemeshop Launcher: Coming Soon & Maintenance Mode (WordPress Plugin) — versions <= 1.0.11

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

patchstack.com/database/vulnerability/launcher/wordpress-launcher-coming-soon-m… (Third Party Advisory)
wordpress.org/plugins/launcher/ (Product, Third Party Advisory)

Frequently asked questions

What is CVE-2021-36829?: CVE-2021-36829 is a medium-severity vulnerability in Mythemeshop Launcher, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2022-09-06.
How severe is CVE-2021-36829?: Medium severity. CVSS v3 base score is 4.8 out of 10.
Is CVE-2021-36829 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.