CVE-2021-20185
MEDIUM
5.3
CVSS Score
Published: January 28, 2021 at 07:01 PM UTC
Updated: June 17, 2026 at 03:33 AM UTC
1 product affected across 1 vendorMoodle
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Severity
MEDIUM5.3
Exploit prediction
EPSS 1%
Description
It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that messaging did not impose a character limit when sending messages, which could result in client-side (browser) denial of service for users receiving very large messages.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 3.5.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.8.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.9.4, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://moodle.org/mod/forum/discuss.php?d=417168CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- LOW
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-400CWE-770
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