CVE-2020-4049

LOWNVD 2.42.4—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 2.4 under NVD CVSS v3. EPSS exploit probability: 2.7%, top 15% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
2.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 2.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In affected versions of WordPress, when uploading themes, the name of the theme folder can be crafted in a way that could lead to JavaScript execution in /wp-admin on the themes page. This does require an admin to upload the theme, and is low severity self-XSS. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, 4.0.31, 3.9.32, 3.8.34, 3.7.34).

CVSS v3
2.4
EG Score
2.4(medium)
EG Risk
16(Track)
EG Risk 16/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity24% × 45%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
84%
KEV
Not listed

Published

June 12, 2020

Last Modified

November 21, 2024

References (16)

Affected Packages

(7 across 7 ecosystems)
Debian:10(1)
PackageVulnerable rangeFixed inDependents
wordpress5.0.4+dfsg1-1, 5.0.4+dfsg1-1+deb10u1, 5.0.4+dfsg1-1+deb10u25.0.10+dfsg1-0+deb10u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
wordpress—5.4.2+dfsg1-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
wordpress—5.4.2+dfsg1-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
wordpress—5.4.2+dfsg1-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
wordpress—5.4.2+dfsg1-1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
wordpress4.1+dfsg-1 ... 4.1.30+dfsg-0+deb8u1 (26 versions)4.1.31+dfsg-0+deb8u1—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
wordpress4.7.5+dfsg-2 ... 4.7.5+dfsg-2+deb9u6 (9 versions)4.7.18+dfsg-1+deb9u1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 137 total refreshes for this CVE.

  1. 2026-09-18 19:23 UTCEPSS rescore
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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-4049?
CVE-2020-4049 is a low vulnerability published on June 12, 2020. In affected versions of WordPress, when uploading themes, the name of the theme folder can be crafted in a way that could lead to JavaScript execution in /wp-admin on the themes page. This does require an admin to upload the theme, and is low severity self-XSS. This has been patched in version…
When was CVE-2020-4049 disclosed?
CVE-2020-4049 was first published in the National Vulnerability Database on June 12, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-4049 actively exploited?
CVE-2020-4049 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 15.8% of all scored CVEs.
What is the CVSS score of CVE-2020-4049?
CVE-2020-4049 has a CVSS v3 base score of 2.4 (NVD).
How do I remediate CVE-2020-4049?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-4049, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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