XSS in WordPress
CVE-2018-20149
In WordPress before 4.9.9 and 5.x before 5.0.1, when the Apache HTTP Server is used, authors could upload crafted files that bypass intended MIME type restrictions, leading to XSS, as demonstrated by a .jpg file without JPEG data.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.029 (86.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: 0.000
Affected products
- WordPress
- Debian Linux — versions 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/106220 (VDB Entry, Third Party Advisory, vdb-entry)
- wordpress.org/support/wordpress-version/version-5-0-1/ (Release Notes, Vendor Advisory)
- codex.wordpress.org/Version_4.9.9 (Product, Vendor Advisory)
- wpvulndb.com/vulnerabilities/9175 (Vendor Advisory)
- github.com/WordPress/WordPress/commit/246a70bdbfac3bd45ff71c7941deef1bb206b19a (Patch, Third Party Advisory)
- www.debian.org/security/2019/dsa-4401 (vendor-advisory, Third Party Advisory)
- wordpress.org/news/2018/12/wordpress-5-0-1-security-release/ (Release Notes, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2019/02/msg00019.html (mailing-list, Mailing List, Third Party Advisory)
- www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user… (Third Party Advisory, Press/Media Coverage)
Frequently asked questions
- What is CVE-2018-20149?
- CVE-2018-20149 is a medium-severity vulnerability in WordPress, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-12-14.
- How severe is CVE-2018-20149?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2018-20149 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.