UpHeron
All vulnerabilities

Servers and applications

CVE-2018-1137

An issue was discovered in Moodle 3.x. By substituting URLs in portfolios, users can instantiate any class. This can also be exploited by users who are logged in as guests to create a DDoS attack.

Severity
High 8.1
Published
25 May 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.7% in the next 30 daysHigher than 77% of CVEs. EPSS by FIRST, 10 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · Needs a user account · No user action needed
Attacker can
Change data · Take it down
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
MoodleServers and applications · cpe:a:moodle:moodle
  • From 3.1.0 up to 3.1.11
  • From 3.2.0 up to 3.2.8
  • From 3.3.0 up to 3.3.5
  • From 3.4.0 up to 3.4.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-1137
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-1137