What’s Vulnerable › Vulnerabilities

CVE-2021-25984: FactorJS - Stored Cross-Site Scripting (XSS) in Post Reply Functionality

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% 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-79

Description

In Factor (App Framework & Headless CMS) forum plugin, versions v1.3.3 to v1.8.30, are vulnerable to stored Cross-Site Scripting (XSS) at the “post reply” section. An unauthenticated attacker can execute malicious JavaScript code and steal the session cookies.

Affected products

• FactorJS Factor: from 1.3.3 through 1.8.30

References

• https://github.com/FactorJS/factor/blob/v1.8.30/%40plugins/plugin-forum/topic-reply.vue#L119
• https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25984
• https://github.com/FactorJS/factor/blob/v1.8.30/%40plugins/plugin-forum/topic-reply.vue#L119
• https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25984

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