CVE-2020-15179

The ScratchSig extension for MediaWiki before version 1.0.1 allows stored Cross-Site Scripting. Using <script> tag inside <scratchsig> tag, attackers with edit permission can execute scripts on visitors' browser. With MediaWiki JavaScript API, this can potentially lead to privilege escalation and/or account takeover. This has been patched in release 1.0.1. This has already been deployed to all Scratch Wikis. No workarounds exist other than disabling the extension completely.

CVSS v3.0 9.0 CRITICAL
CVSS v2.0 4.6 MEDIUM

9.0^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

4.6^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:H/Au:S/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector NETWORK

Access Complexity HIGH

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/InternationalScratchWiki/wiki-scratchsig/commit/4160a39a20eebeb63a59eb7597a91b961eca6388	Patch Third Party Advisory
https://github.com/InternationalScratchWiki/wiki-scratchsig/security/advisories/GHSA-gp9v-pg9f-vmp6	Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:scratch-wiki:scratchsig:*:*:*:*:*:mediawiki:*:*

Information

Published : 2020-09-15 11:15

Updated : 2020-09-22 10:05

NVD link : CVE-2020-15179

Mitre link : CVE-2020-15179

JSON object : View

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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Products Affected

scratch-wiki

scratchsig

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