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.

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)

EPSS: 0.012 (66.1th percentile) — read the EPSS interpretation.

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.

Affected products

Internationalscratchwiki Wiki-scratchsig — versions < 1.0.1
Scratch-wiki Scratchsig

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)

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.