PatchTheCVECVE-2025-3581: The Newsletter WordPress plugin before 8.8.5 does not validate and escape some of its Widget options before o
CVE-2025-3581 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 8.8.5 does not validate and escape some of its Widget options before outputting them back in a page/post where the block is embed, 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 | 0.3% (top 83%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2025-06-09 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
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-2025-3581?
newsletter: upgrade to 8.8.5. Exact commands for each OS are on this page.
Is CVE-2025-3581 being exploited?
CVE-2025-3581 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-2025-3581 affect?
CVE-2025-3581 affects newsletter. Severity is medium (CVSS 4.8). The Newsletter WordPress plugin before 8.8.5 does not validate and escape some of its Widget options before outputting them back in a page/post where the block is embed, which could allow high privilege users such as admin to perform Store
How urgent is CVE-2025-3581?
Priority 26/100. Public exploit reference
Software pages
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