How severe is CVE-2025-66055?

CVE-2025-66055 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-66055 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-66055?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-66055 have an EU (EUVD) identifier?

Yes. CVE-2025-66055 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198485.

When was CVE-2025-66055 published?

CVE-2025-66055 was published on 2025-11-21 and last updated on 2026-06-17.

CVE-2025-66055

CVE-2025-66055 is a high-severity vulnerability with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198485
Weakness: CWE-502
Published: 2025-11-21
Last modified: 2026-06-17

Description

Deserialization of Untrusted Data vulnerability in Icegram Email Subscribers & Newsletters email-subscribers allows Object Injection.This issue affects Email Subscribers & Newsletters: from n/a through <= 5.9.10.

Frequently asked questions

What is CVE-2025-66055?: Deserialization of Untrusted Data vulnerability in Icegram Email Subscribers & Newsletters email-subscribers allows Object Injection.This issue affects Email Subscribers & Newsletters: from n/a through <= 5.9.10.
How severe is CVE-2025-66055?: CVE-2025-66055 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-66055 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-66055?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-66055 have an EU (EUVD) identifier?: Yes. CVE-2025-66055 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198485.
When was CVE-2025-66055 published?: CVE-2025-66055 was published on 2025-11-21 and last updated on 2026-06-17.

References

https://patchstack.com/database/Wordpress/Plugin/email-subscribers/vulnerability/wordpress-email-subscribers-newsletters-plugin-5-9-10-php-object-injection-vulnerability?_s_id=cve

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