onyx

onyx --cves cve-2020-4049

CVE-2020-4049

LOWWordPress
score
<0.1
cvss
2.4
epss
2.5%
published
2020-06-12
kev added
—
first seen

WordPress < 5.4.2 contains a self-XSS caused by crafted theme folder names during theme upload, letting an admin execute JavaScript in /wp-admin on the themes page, exploit requires admin upload.

Timeline

How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.

events2020-06-12 — PublishedP2026-10-21 — Tracked by OnyxTscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 2.5%2026-09-23: epss 2.5%2026-09-24: epss 2.5%2026-09-25: epss 2.5%2026-09-26: epss 2.5%2026-09-27: epss 2.5%2026-09-28: epss 2.5%2026-09-29: epss 2.5%2026-09-30: epss 2.5%2026-10-01: epss 2.5%2026-10-02: epss 2.5%2026-10-03: epss 2.5%2026-10-04: epss 2.5%2026-10-05: epss 2.5%2026-10-06: epss 2.5%2026-10-07: epss 2.5%2026-10-08: epss 2.5%2026-10-09: epss 2.5%2026-10-10: epss 2.5%2026-10-11: epss 2.5%2026-10-12: epss 2.5%2026-10-13: epss 2.5%2026-10-14: epss 2.5%2026-10-15: epss 2.5%2026-10-16: epss 2.5%2026-10-18: epss 2.5%2026-10-19: epss 2.5%2026-10-20: epss 2.5%2026-10-21: epss 2.5%2.5%mentions/day0no mentions in 30 days2026-09-22today
  1. Published
  2. Tracked by Onyx

Weaknesses

CWE-80 CWE-79

References 8