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CVE-2021-25984

21
FAUCET Score

CVE-2021-25984 describes a stored Cross-Site Scripting (XSS) vulnerability in the Factor (App Framework & Headless CMS) forum plugin, affecting versions v1.3.3 to v1.8.30. An unauthenticated attacker can inject malicious JavaScript into the "post reply" section, potentially leading to session cookie theft. This vulnerability is rated Medium (CVSS 6.1) due to its network attack vector and low complexity, requiring user interaction but impacting confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.3.3, <= 1.8.30CPE matchmatch criteria
cpe:2.3:a:darwin:factor:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.69%
Probability of exploitation in next 30 days
EPSS Percentile
49.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0069 is in the 54th percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / FactorJS/factor/blob/v1.8.30/%40plugins/plugin-forum/topic-reply.vue
whitesourcesoftware.com / vulnerability-database/CVE-2021-25984
Third Party Advisory