CVE-2026-78284: stylemix masterstudy lms Path Traversal
CVSS: 9.1v3.1CriticalDeferred
Published 24-08-2026Last modified 25-08-2026
Vulnerability summary
CVE-2026-78284 is a critical (CVSS 9.1) Path Traversal vulnerability in stylemix masterstudy lms. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 43.8% of scored vulnerabilities. Fixed in 3.7.43.
CVSS score
9.1/10
010
Critical · v3.1 (wordfence)EPSS score
0.53%
0%100%
Low · +0.19 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 24-08-2026PublishedVulnerability first disclosed.
- 25-08-2026Last modifiedVulnerability information updated.
Description
Unauthenticated Arbitrary File Deletion in MasterStudy LMS <= 3.7.42 versions.
CVSS metrics
3 scores · 3 sources · 1 versionCritical 9.1Preferred score · wordfence (Source)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HSources3 sources · 8.6–9.1
- CVE.orgCNA8.6HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HDiffers
- NVDNIST8.6HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.53%
Chance of exploitation in the next 30 days
Percentile
44%
Versus all other CVEs
30-day change
+0.19 pp
From 0.35% on 19-09-2026
19-09-202619-10-2026
EPSS score0.53%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Stylemix1 product
- masterstudy lms≥ n/a, ≤ 3.7.42
Wordpress1 product
- masterstudy-lms-learning-management-system≤ 3.7.42 (fixed in 3.7.43)
2 vendors · 2 products
References
2 links- patchstack.com/database/…VDB Entry