Elgg
CVE-2013-0234
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 4.3 (MEDIUM). Attack characteristics: network attack vector, M complexity. Public proof-of-concept exploit code is available. EPSS exploitation probability: 0.55%. |
| Exploit ScenarioDerived | A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. |
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Alert meAnalysisAI
Cross-site scripting (XSS) vulnerability in the Twitter widget in Elgg before 1.7.17 and 1.8.x before 1.8.13 allows remote attackers to inject arbitrary web script or HTML via the. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable. Public exploit code available.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
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 as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Cross-site scripting (XSS) vulnerability in the Twitter widget in Elgg before 1.7.17 and 1.8.x before 1.8.13 allows remote attackers to inject arbitrary web script or HTML via the params[twitter_username] parameter to action/widgets/save. Affected products include: Elgg. Version information: before 1.7.17.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:M/Au:N/C:N/I:P/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
Cross-site scripting (XSS) vulnerability in the Twitter widget in Elgg before 1.7.17 and 1.8.x before 1.8.13 allows remote attackers to inject arbitrary web script or HTML via the params[twitter_username] parameter to action/widgets/save.
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
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)CVE.org
elgg is vulnerable to Exposure of Private Personal Information to an Unauthorized Actor. Rated high severity (CVSS 7.5),
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
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