8.8

CVE-2021-41246: auth0 express_openid_connect Session Fixation

CVSS: 8.8v3.1HighModified
AliasesGHSA-7rg2-qxmf-hhx9
Published 09-12-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-41246 is a high (CVSS 8.8) Session Fixation vulnerability in auth0 express_openid_connect. EPSS estimates a 0.92% chance of exploitation in the next 30 days, higher than 59.7% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
0.92%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-12-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Express OpenID Connect is express JS middleware implementing sign on for Express web apps using OpenID Connect. Versions before and including `2.5.1` do not regenerate the session id and session cookie when user logs in. This behavior opens up the application to various session fixation vulnerabilities. Versions `2.5.2` contains a patch for this issue.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.92%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

+0.03 pp

From 0.89% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.92%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Auth02 products
Npm1 product
  • express-openid-connect≥ 2.3.0, < 2.5.2

2 vendors · 3 products

References

5 links