CVE-2025-3584: The Newsletter WordPress plugin before 8.8.2 does not sanitise and escape some of its Subscription settings,

Q: How do I fix CVE-2025-3584?

newsletter: upgrade to 8.8.2. Exact commands for each OS are on this page.

Q: Is CVE-2025-3584 being exploited?

CVE-2025-3584 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-2025-3584 affect?

CVE-2025-3584 affects newsletter. Severity is medium (CVSS 4.8). The Newsletter WordPress plugin before 8.8.2 does not sanitise and escape some of its Subscription settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html

Q: How urgent is CVE-2025-3584?

Priority 26/100. Public exploit reference

Routine

MEDIUM 4.8UPGRADE

CVE-2025-3584 is a medium-severity flaw (CVSS 4.8) affecting newsletter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Newsletter WordPress plugin before 8.8.2 does not sanitise and escape some of its Subscription settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-06-03
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: thenewsletterplugin

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

Am I affected?

Timeline

2025-06-03 06:15 UTCPublished CVE record published
2026-06-17 09:20 UTCUpdated Record last modified

thenewsletterplugin newsletter UPGRADE

Affected: < 8.8.2

Fixed in: 8.8.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy newsletter || rpm -q newsletter || newsletter --version

2. UPGRADE to 8.8.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade newsletter

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade newsletter

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2025-3584?

newsletter: upgrade to 8.8.2. Exact commands for each OS are on this page.

Is CVE-2025-3584 being exploited?

CVE-2025-3584 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-2025-3584 affect?

CVE-2025-3584 affects newsletter. Severity is medium (CVSS 4.8). The Newsletter WordPress plugin before 8.8.2 does not sanitise and escape some of its Subscription settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html

How urgent is CVE-2025-3584?

Priority 26/100. Public exploit reference

Software pages

WordPress vulnerabilities

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References

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