CVE-2021-25985: FactorJS - Insufficient Session Expiration Leads to a Local Account Takeover

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-16 · updated 2026-06-17
Weakness: CWE-613

Description

In Factor (App Framework & Headless CMS) v1.0.4 to v1.8.30, improperly invalidate a user’s session even after the user logs out of the application. In addition, user sessions are stored in the browser’s local storage, which by default does not have an expiration time. This makes it possible for an attacker to steal and reuse the cookies using techniques such as XSS attacks, followed by a local account takeover.

Affected products

FactorJS Factor: from 1.0.4 through 1.8.30

References

https://github.com/FactorJS/factor/blob/v1.8.30/%40factor/user/util.ts#L65
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25985
https://github.com/FactorJS/factor/blob/v1.8.30/%40factor/user/util.ts#L65
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25985

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