CVE-2020-26120 Cross-site scripting in n/a

What is CVE-2020-26120?

CVE-2020-26120 is a medium-severity cross-site scripting vulnerability in Fedoraproject Fedora, published on 27 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

XSS exists in the MobileFrontend extension for MediaWiki before 1.34.4 because section.line is mishandled during regex section line replacement from PageGateway. Using crafted HTML, an attacker can elicit an XSS attack via jQuery's parseHTML method, which can cause image callbacks to fire even without the element being appended to the DOM.

Weakness: CWE-79

Which versions are affected by CVE-2020-26120?

1 open source package ship an affected version, including mediawiki. It affects 2 products.

Products include Fedoraproject Fedora, Mediawiki Mediawiki.

How do I fix CVE-2020-26120?

Upgrade mediawiki to 1.34.4 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-26120 being exploited?

There is no known exploitation of CVE-2020-26120 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-mediawiki-2020-26120, GHSA-h2mq-xrr7-hwv8.