How severe is CVE-2025-26873?

CVE-2025-26873 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-26873 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-26873?

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-2025-26873 have an EU (EUVD) identifier?

Yes. CVE-2025-26873 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8520.

When was CVE-2025-26873 published?

CVE-2025-26873 was published on 2025-03-27 and last updated on 2026-06-17.

CVE-2025-26873

CVE-2025-26873 is a critical-severity vulnerability with a CVSS 3.x base score of 9.0. 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: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-8520
Weakness: CWE-502
Published: 2025-03-27
Last modified: 2026-06-17

Description

Deserialization of Untrusted Data vulnerability in shinetheme Traveler traveler.This issue affects Traveler: from n/a through < 3.2.1.

Frequently asked questions

What is CVE-2025-26873?: Deserialization of Untrusted Data vulnerability in shinetheme Traveler traveler.This issue affects Traveler: from n/a through < 3.2.1.
How severe is CVE-2025-26873?: CVE-2025-26873 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-26873 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-26873?: 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-2025-26873 have an EU (EUVD) identifier?: Yes. CVE-2025-26873 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8520.
When was CVE-2025-26873 published?: CVE-2025-26873 was published on 2025-03-27 and last updated on 2026-06-17.

References

https://patchstack.com/database/Wordpress/Theme/traveler/vulnerability/wordpress-traveler-theme-3-1-8-php-object-injection-vulnerability?_s_id=cve

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