Elgg
CVE-2021-3980
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V14 - Data Protection PII protection
|
| Impact | CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system. |
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Alert meAnalysisAI
elgg is vulnerable to Exposure of Private Personal Information to an Unauthorized Actor. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in composer
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified under CWE-359. elgg is vulnerable to Exposure of Private Personal Information to an Unauthorized Actor Affected products include: Elgg.
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
elgg is vulnerable to Exposure of Private Personal Information to an Unauthorized Actor
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)NVD
elgg is vulnerable to Authorization Bypass Through User-Controlled Key. Rated medium severity (CVSS 5.9), this vulnerabi
elgg is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). Rated medium
Cross-site scripting (XSS) vulnerability in the Twitter widget in Elgg before 1.7.17 and 1.8.x before 1.8.13 allows remo
engine/lib/users.php in Elgg before 1.8.5 does not properly specify permissions for the useradd action, which allows rem
Elgg before 1.12.18 and 2.3.x before 2.3.11 has an open redirect. Rated medium severity (CVSS 6.1), this vulnerability i
Cross-site scripting (XSS) vulnerability in engine/lib/views.php in Elgg before 1.8.5 allows remote attackers to inject
engine/lib/access.php in Elgg before 1.8.5 does not properly clear cached access lists during plugin boot, which allows
Elgg's ImageService processes avatar uploads without validating source image dimensions prior to resizing, allowing auth
Exploit-DB