How severe is CVE-2026-54803?

CVE-2026-54803 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-54803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-54803?

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

Does CVE-2026-54803 have an EU (EUVD) identifier?

Yes. CVE-2026-54803 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37639.

When was CVE-2026-54803 published?

CVE-2026-54803 was published on 2026-06-17.

CVE-2026-54803

CVE-2026-54803 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. 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-863.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37639
Weakness: CWE-863
Published: 2026-06-17
Last modified: 2026-06-17

Description

Subscriber Privilege Escalation in SMS Alert Order Notifications <= 3.9.4 versions.

Frequently asked questions

What is CVE-2026-54803?: Subscriber Privilege Escalation in SMS Alert Order Notifications <= 3.9.4 versions.
How severe is CVE-2026-54803?: CVE-2026-54803 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-54803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-54803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-54803 have an EU (EUVD) identifier?: Yes. CVE-2026-54803 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37639.
When was CVE-2026-54803 published?: CVE-2026-54803 was published on 2026-06-17.

References

https://patchstack.com/database/wordpress/plugin/sms-alert/vulnerability/wordpress-sms-alert-order-notifications-plugin-3-9-4-privilege-escalation-vulnerability?_s_id=cve

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