What is CVE-2022-29420?

CVE-2022-29420 is a medium-severity vulnerability in Adam Skaat Countdown & Clock (WordPress Plugin), classified under Cross-site Scripting. CVSS score: 5.9/10. Published 2022-05-06.

How severe is CVE-2022-29420?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Is CVE-2022-29420 known to be exploited?

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

XSS in Adam Skaat Countdown & Clock (WordPress Plugin)

CVE-2022-29420

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Adam Skaat Countdown & Clock (WordPress plugin) countdown-builder allows Stored XSS.This issue affects Countdown & Clock (WordPress plugin): from n/a through 2.3.2.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-05-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (35.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

patchstack.com/database/vulnerability/countdown-builder/wordpress-countdown-clo… (Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2022-29420?: CVE-2022-29420 is a medium-severity vulnerability in Adam Skaat Countdown & Clock (WordPress Plugin), classified under Cross-site Scripting. CVSS score: 5.9/10. Published 2022-05-06.
How severe is CVE-2022-29420?: Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2022-29420 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.