CVE-2021-21424CWE-200

Prevent user enumeration using Guard or the new Authenticator-based Security

Medium · published May 13, 2021

CVSS v3.1
5.3
EPSS
2%
Percentile
76.2
In the wild
Unconfirmed
What it is

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The ability to enumerate users was possible without relevant permissions due to different handling depending on whether the user existed or not when attempting to use the switch users functionality. We now ensure that 403s are returned whether the user exists or not if a user cannot switch to a user or if the user does not exist. The patch for this issue is available for branch 3.4.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.01644 · 76.2th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2021-05-13T00:00Z
EPSS history
Timeline
  • 13 MAY 00:00Z
    Prevent user enumeration using Guard or the new Authenticator-based Security
    cvelistv5