How severe is CVE-2026-4259?

CVE-2026-4259 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-4259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4259?

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-2026-4259 have an EU (EUVD) identifier?

Yes. CVE-2026-4259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38212.

When was CVE-2026-4259 published?

CVE-2026-4259 was published on 2026-06-22.

CVE-2026-4259

CVE-2026-4259 is a high-severity vulnerability with a CVSS 3.x base score of 7.1. 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-79.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38212
Weakness: CWE-79
Published: 2026-06-22
Last modified: 2026-06-22

Description

The ultimate-woocommerce-auction-pro WordPress plugin through 2.4.5 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

Frequently asked questions

What is CVE-2026-4259?: The ultimate-woocommerce-auction-pro WordPress plugin through 2.4.5 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin
How severe is CVE-2026-4259?: CVE-2026-4259 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-4259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-4259?: 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-2026-4259 have an EU (EUVD) identifier?: Yes. CVE-2026-4259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38212.
When was CVE-2026-4259 published?: CVE-2026-4259 was published on 2026-06-22.

References

https://wpscan.com/vulnerability/a98d234b-11e8-4a07-8593-982d656a4fd3/

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