How severe is CVE-2025-53620?

CVE-2025-53620 has a CVSS 4.0 base score of 9.2, rated critical severity.

Is CVE-2025-53620 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-53620?

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-2025-53620 have an EU (EUVD) identifier?

Yes. CVE-2025-53620 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20869.

When was CVE-2025-53620 published?

CVE-2025-53620 was published on 2025-07-09 and last updated on 2026-06-17.

CVE-2025-53620

CVE-2025-53620 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.2. 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-248.

Key facts

Severity: Critical (CVSS 4.0 base score 9.2)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-20869
Weakness: CWE-248
Published: 2025-07-09
Last modified: 2026-06-17

Description

@builder.io/qwik-city is the meta-framework for Qwik. When a Qwik Server Action QRL is executed it dynamically load the file containing the symbol. When an invalid qfunc is sent, the server does not handle the thrown error. The error then causes Node JS to exit. This vulnerability is fixed in 1.13.0.

Frequently asked questions

What is CVE-2025-53620?: @builder.io/qwik-city is the meta-framework for Qwik. When a Qwik Server Action QRL is executed it dynamically load the file containing the symbol. When an invalid qfunc is sent, the server does not handle the thrown error. The error then causes Node JS to exit. This vulnerability is fixed in 1.13.0.
How severe is CVE-2025-53620?: CVE-2025-53620 has a CVSS 4.0 base score of 9.2, rated critical severity.
Is CVE-2025-53620 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-53620?: 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-2025-53620 have an EU (EUVD) identifier?: Yes. CVE-2025-53620 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20869.
When was CVE-2025-53620 published?: CVE-2025-53620 was published on 2025-07-09 and last updated on 2026-06-17.

References

https://github.com/QwikDev/qwik/security/advisories/GHSA-qr9h-j6xg-2j72

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