CVE-2021-25984: In Factor (App Framework & Headless CMS) forum plugin, versions v1.3.3 to v1.8.30, are vulnerable to stored Cr

Q: How do I fix CVE-2021-25984?

factor: upgrade to newer than 1.8.30. Exact commands for each OS are on this page.

Q: Is CVE-2021-25984 being exploited?

CVE-2021-25984 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-25984 affect?

CVE-2021-25984 affects factor. Severity is medium (CVSS 6.1). 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

Q: How urgent is CVE-2021-25984?

Priority 35/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2021-25984 is a medium-severity flaw (CVSS 6.1) affecting factor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-11-16
Last modified	2026-06-17

Publisher (CNA): Mend · Vendor: darwin

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-11-16 10:15 UTCPublished CVE record published
2026-06-17 03:42 UTCUpdated Record last modified

darwin factor UPGRADE

Affected: >= 1.3.3 and <= 1.8.30

Fixed in: newer than 1.8.30

Safe to downgrade to: a release before 1.3.3

1. Check installed version

npm ls factor

2. UPGRADE to newer than 1.8.30

npm install factor@">1.8.30"

3. If no update is available yet, DOWNGRADE to a release before 1.3.3

npm view factor versions npm install factor@"<1.3.3"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-25984?

factor: upgrade to newer than 1.8.30. Exact commands for each OS are on this page.

Is CVE-2021-25984 being exploited?

CVE-2021-25984 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-25984 affect?

CVE-2021-25984 affects factor. Severity is medium (CVSS 6.1). 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

How urgent is CVE-2021-25984?

Priority 35/100. No elevated risk signals yet.

Related CVEs

CVE-2021-25985 HIGH 7.8 UPGRADE In Factor (App Framework & Headless CMS) v1.0.4 to v1.8.30, improperly invalidate a user’s session even after
CVE-2021-25983 MEDIUM 6.1 UPGRADE In Factor (App Framework & Headless CMS) forum plugin, versions v1.3.8 to v1.8.30, are vulnerable to reflected
CVE-2021-25982 MEDIUM 6.1 UPGRADE In Factor (App Framework & Headless CMS) forum plugin, versions 1.3.5 to 1.8.30, are vulnerable to reflected C

References

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