CVE-2025-13434

CVE-2025-13434 is a medium-severity vulnerability in Jameschz Hush with a CVSS 3.x base score of 5.3. 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-644.

Key facts

Description

A weakness has been identified in jameschz Hush Framework 2.0. The impacted element is an unknown function of the file Hush\hush-lib\hush\Util.php of the component HTTP Host Header Handler. This manipulation of the argument $_SERVER['HOST'] causes improper neutralization of http headers for scripting syntax. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be exploited. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2025-13434?
A weakness has been identified in jameschz Hush Framework 2.0. The impacted element is an unknown function of the file Hush\hush-lib\hush\Util.php of the component HTTP Host Header Handler. This manipulation of the argument $_SERVER['HOST'] causes improper neutralization of http headers for scripting syntax. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be exploited. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2025-13434?
CVE-2025-13434 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-13434 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.
What products are affected by CVE-2025-13434?
CVE-2025-13434 affects Jameschz Hush. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-13434?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-13434 have an EU (EUVD) identifier?
Yes. CVE-2025-13434 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198257.
When was CVE-2025-13434 published?
CVE-2025-13434 was published on 2025-11-20 and last updated on 2026-06-17.

References

Affected products (1)

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