Improper input validation in Medialize Uri.js
CVE-2020-26291
URI.js is a javascript URL mutation library (npm package urijs). In URI.js before version 1.19.4, the hostname can be spoofed by using a backslash (`\`) character followed by an at (`@`) character. If the hostname is used in security decisions, the decision may be incorrect. Depending on library usage and attacker intent, impacts may include allow/block list bypasses, SSRF attacks, open redirects, or other undesired behavior. For example the URL `https://expected-example.com\@observed-example.com` will incorrectly return `observed-example.com` if using an affected version. Patched versions correctly return `expected-example.com`. Patched versions match the behavior of other parsers which implement the WHATWG URL specification, including web browsers and Node's built-in URL class. Version 1.19.4 is patched against all known payload variants. Version 1.19.3 has a partial patch but is still vulnerable to a payload variant.]
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.017 (76.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: +0.000
Affected products
- Medialize Uri.js — versions < 1.19.4
- Uri.js Project
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/medialize/URI.js/security/advisories/GHSA-3329-pjwv-fjpg (Third Party Advisory)
- www.npmjs.com/package/urijs (Third Party Advisory)
- github.com/medialize/URI.js/releases/tag/v1.19.4 (Third Party Advisory, Release Notes)
- github.com/medialize/URI.js/commit/b02bf037c99ac9316b77ff8bfd840e90becf1155 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-26291?
- CVE-2020-26291 is a medium-severity vulnerability in Medialize Uri.js, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2020-12-31.
- How severe is CVE-2020-26291?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2020-26291 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.