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Vulnerability details: VCID-k7y9-719w-tqh5
Vulnerability ID VCID-k7y9-719w-tqh5
Aliases CVE-2020-4049
Summary 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).
Status Published
Exploitability 0.5
Weighted Severity 3.1
Risk 1.6
Affected and Fixed Packages Package Details
Weaknesses (0)
There are no known CWE.
System Score Found at
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02293 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02463 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02463 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
epss 0.02463 https://api.first.org/data/v1/epss?cve=CVE-2020-4049
cvssv2 3.5 https://nvd.nist.gov/vuln/detail/CVE-2020-4049
cvssv3.1 2.4 https://nvd.nist.gov/vuln/detail/CVE-2020-4049
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-4049
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25286
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4047
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4048
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4049
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4050
https://github.com/WordPress/wordpress-develop/commit/404f397b4012fd9d382e55bf7d206c1317f01148
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-87h4-phjv-rm6p
https://lists.debian.org/debian-lts-announce/2020/07/msg00000.html
https://lists.debian.org/debian-lts-announce/2020/09/msg00011.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/773N2ZV7QEMBGKH6FBKI6Q5S3YJMW357/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODNHXVJS25YVWYQHOCICXTLIN5UYJFDN/
https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-release/
https://www.debian.org/security/2020/dsa-4709
962685 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=962685
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
CVE-2020-4049 https://nvd.nist.gov/vuln/detail/CVE-2020-4049
No exploits are available.
Vector: AV:N/AC:M/Au:S/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-4049
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-4049
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.84059
EPSS Score 0.02293
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T10:09:53.045682+00:00 NVD Importer Import https://nvd.nist.gov/vuln/detail/CVE-2020-4049 37.0.0