How severe is CVE-2026-28138?

CVE-2026-28138 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-2026-28138 being actively exploited?

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

How do I fix CVE-2026-28138?

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-2026-28138 have an EU (EUVD) identifier?

Yes. CVE-2026-28138 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8847.

When was CVE-2026-28138 published?

CVE-2026-28138 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-28138

CVE-2026-28138 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% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8847
Weakness: CWE-502
Published: 2026-02-26
Last modified: 2026-06-17

Description

Deserialization of Untrusted Data vulnerability in Stylemix uListing ulisting allows Object Injection.This issue affects uListing: from n/a through <= 2.2.0.

Frequently asked questions

What is CVE-2026-28138?: Deserialization of Untrusted Data vulnerability in Stylemix uListing ulisting allows Object Injection.This issue affects uListing: from n/a through <= 2.2.0.
How severe is CVE-2026-28138?: CVE-2026-28138 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-2026-28138 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-28138?: 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-2026-28138 have an EU (EUVD) identifier?: Yes. CVE-2026-28138 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8847.
When was CVE-2026-28138 published?: CVE-2026-28138 was published on 2026-02-26 and last updated on 2026-06-17.

References

https://patchstack.com/database/Wordpress/Plugin/ulisting/vulnerability/wordpress-ulisting-plugin-2-2-0-php-object-injection-vulnerability?_s_id=cve

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