CVE-2021-39348 json
LearnPress – WordPress LMS Plugin <= 4.1.3.1 Authenticated Stored Cross-Site Scripting
published 2021-10-21 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-25709
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.2%
- EPSS 5.2% chance of exploitation in 30 days, percentile 92%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 20 mo ago
Exploit prediction
5.20% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/BigTiger2020/word-press/blob/main/LearnPress.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
Affected products
- LearnPress LearnPress
Classification
- Weakness
- Technology feeds
References
-
plugins.trac.wordpress.org
/changeset?sfp_email=&sfph_mail=&reponame=&old=2614592%40learnpress&new=2614592%40learnpress&sfp_email=&sfph_m
patch, third-party-advisory
-
github.com
/BigTiger2020/word-press/blob/main/LearnPress.md
exploit, third-party-advisory
-
wordfence.com
/vulnerability-advisories/#CVE-2021-39348
third-party-advisory
Sources
- CVE List CVE-2021-39348
- NVD CVE-2021-39348
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.