CVE-2026-63234: Three Learning Koollab LMS · SQL Injection
Affects Three Learning Koollab LMSSource CVE Database V5
Not known to be exploited · CVSS 9.9 Critical.
Data as of 28 Oct 2026, 05:11 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 29 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Three LearningKoollab LMS | Affected
| Fixed in– |
AI-suggested
Until a patch is available, restrict access to the manual mark assessment endpoint to trusted users only and monitor for suspicious activity related to unserialize() usage.
Description
CVE-2026-63234 is a critical vulnerability in Three Learning's Koollab LMS version 5.3.2. It involves a SQL injection and unsafe deserialization flaw in the manual mark assessment endpoint. An authenticated attacker can exploit this to inject malicious input, control data passed to the unserialize() function, write a webshell to a publicly accessible location, and execute arbitrary code on the server.