XSS in Learnpress
CVE-2021-39348
The LearnPress WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient escaping on the $custom_profile parameter found in the ~/inc/admin/views/backend-user-profile.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 4.1.3.1. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled. Please note that this is seperate from CVE-2021-24702.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.052 (92.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.052 · newest: 0.052 · change: 0.000
Affected products
- Learnpress — versions 4.1.3.1
- Thimpress Learnpress
Weakness classification (CWE)
Public proof-of-concept exploits
References
- plugins.trac.wordpress.org/changeset (Patch, Third Party Advisory)
- wordfence.com/vulnerability-advisories/ (Third Party Advisory)
- github.com/BigTiger2020/word-press/blob/main/LearnPress.md (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-39348?
- CVE-2021-39348 is a medium-severity vulnerability in Learnpress, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 5.5/10. Published 2021-10-21.
- How severe is CVE-2021-39348?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-39348 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.