XSS in Internationalscratchwiki Wiki-Scratchsig
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.012 (67.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Internationalscratchwiki Wiki-Scratchsig — versions < 1.0.1
- Scratch-Wiki Scratchsig
Weakness classification (CWE)
References
- github.com/InternationalScratchWiki/wiki-scratchsig/security/advisories/GHSA-gp… (Third Party Advisory)
- github.com/InternationalScratchWiki/wiki-scratchsig/commit/4160a39a20eebeb63a59… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15179?
- CVE-2020-15179 is a high-severity vulnerability in Internationalscratchwiki Wiki-Scratchsig, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2020-09-15.
- How severe is CVE-2020-15179?
- High severity. CVSS v3 base score is 8.0 out of 10.