CVE-2021-21332CWE-79

Cross-site scripting (XSS) vulnerability in the password reset endpoint

Medium · published March 26, 2021

CVSS v3.1
6.9
EPSS
1%
Percentile
68.5
In the wild
Unconfirmed
What it is

Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.27.0, the password reset endpoint served via Synapse was vulnerable to cross-site scripting (XSS) attacks. The impact depends on the configuration of the domain that Synapse is deployed on, but may allow access to cookies and other browser data, CSRF vulnerabilities, and access to other resources served on the same domain or parent domains. This is fixed in version 1.27.0.

The record
Technical detail
CVSS v3.1
6.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.01221 · 68.5th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2021-03-26T19:55Z
EPSS history
Timeline
  • 26 MAR 19:55Z
    Cross-site scripting (XSS) vulnerability in the password reset endpoint
    cvelistv5