Vulnerability · Published Nov 27, 2021 · Assigned by @huntrdev
CVE-2021-4020Cross-site Scripting (XSS) - Stored in meetecho/janus-gateway
High 8.8
In plain English
A high-severity cross-site scripting in meetecho/janus-gateway from meetecho. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.0)8.8High
Exploit odds (30 days)0.8%top 41.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
janus-gateway is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | janus | 0.11.5-4 | DEBIAN-CVE-2021-4020 |
| Debian:14 | janus | 0.11.5-4 | DEBIAN-CVE-2021-4020 |
| Ubuntu:22.04:LTS | janus | no fix listed | UBUNTU-CVE-2021-4020 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| meetecho | meetecho/janus-gateway | unspecified – before 0.11.6 |
Weakness: CWE-79 · Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H