CVE-2020-4049 : In affected versions of WordPress, when uploading themes, the name of the theme

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).

Published 2020-06-12 16:15:11

Updated 2020-12-23 18:51:42

Source GitHub, Inc.

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2020-4049

Debian » Debian Linux » Version: 8.0
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 5.3.0 and before (<) 5.3.4
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 4.8 and before (<) 4.8.14
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 5.4 and before (<) 5.4.2
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 4.5 and before (<) 4.5.22
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 4.1 and before (<) 4.1.31
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 3.9 and before (<) 3.9.32
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 4.7 and before (<) 4.7.18
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 5.0 and before (<) 5.0.10
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 3.7 and before (<) 3.7.34
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 4.0 and before (<) 4.0.31
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 5.1 and before (<) 5.1.6
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 4.2 and before (<) 4.2.28
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 4.9 and before (<) 4.9.15
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 4.3 and before (<) 4.3.24
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 4.6 and before (<) 4.6.19
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 5.2 and before (<) 5.2.7
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 4.4 and before (<) 4.4.23
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 3.8 and before (<) 3.8.34
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 31
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 32
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2020-4049

Top countries where our scanners detected CVE-2020-4049

Top open port discovered on systems with this issue 80

IPs affected by CVE-2020-4049 80

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2020-4049!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2020-4049

EPSS FAQ

0.12%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 46 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-4049

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
3.5	LOW	AV:N/AC:M/Au:S/C:N/I:P/A:N	6.8	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: Single Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
2.4	LOW	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N	0.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: High User Interaction: Required Scope: Unchanged Confidentiality: None Integrity: Low Availability: None
2.4	LOW	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N	0.9	1.4	GitHub, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: High User Interaction: Required Scope: Unchanged Confidentiality: None Integrity: Low Availability: None

CWE ids for CVE-2020-4049

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Assigned by: nvd@nist.gov (Secondary)
CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.

Assigned by: security-advisories@github.com (Primary)

References for CVE-2020-4049

https://www.debian.org/security/2020/dsa-4709

Debian -- Security Information -- DSA-4709-1 wordpress
Third Party Advisory

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/773N2ZV7QEMBGKH6FBKI6Q5S3YJMW357/

[SECURITY] Fedora 31 Update: wordpress-5.4.2-1.fc31 - package-announce - Fedora Mailing-Lists
Third Party Advisory

CVEs referencing this url
https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-release/

News – WordPress 5.4.2 Security and Maintenance Release – WordPress.org
Vendor Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2020/09/msg00011.html

[SECURITY] [DLA 2371-1] wordpress security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-87h4-phjv-rm6p

WordPress: Authenticated self-XSS via theme uploads · Advisory · WordPress/wordpress-develop · GitHub
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00000.html

[SECURITY] [DLA 2269-1] wordpress security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://github.com/WordPress/wordpress-develop/commit/404f397b4012fd9d382e55bf7d206c1317f01148

Themes: Ensure a broken theme name is returned properly. · WordPress/wordpress-develop@404f397 · GitHub
Patch;Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ODNHXVJS25YVWYQHOCICXTLIN5UYJFDN/

[SECURITY] Fedora 32 Update: wordpress-5.4.2-1.fc32 - package-announce - Fedora Mailing-Lists
Third Party Advisory

CVEs referencing this url