How severe is CVE-2025-30347?

CVE-2025-30347 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-30347 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-30347?

CVE-2025-30347 primarily affects Varnish-software Varnish Enterprise. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-30347?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-30347 have an EU (EUVD) identifier?

Yes. CVE-2025-30347 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7263.

When was CVE-2025-30347 published?

CVE-2025-30347 was published on 2025-03-21 and last updated on 2026-06-17.

CVE-2025-30347

CVE-2025-30347 is a medium-severity vulnerability in Varnish-software Varnish Enterprise with a CVSS 3.x base score of 4.0. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 4.0)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-7263
Weakness: CWE-125
Affected product: Varnish-software Varnish Enterprise
Published: 2025-03-21
Last modified: 2026-06-17

Description

Varnish Enterprise before 6.0.13r13 allows remote attackers to obtain sensitive information via an out-of-bounds read for range requests on ephemeral MSE4 stevedore objects.

Frequently asked questions

What is CVE-2025-30347?: Varnish Enterprise before 6.0.13r13 allows remote attackers to obtain sensitive information via an out-of-bounds read for range requests on ephemeral MSE4 stevedore objects.
How severe is CVE-2025-30347?: CVE-2025-30347 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-30347 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-30347?: CVE-2025-30347 primarily affects Varnish-software Varnish Enterprise. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-30347?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-30347 have an EU (EUVD) identifier?: Yes. CVE-2025-30347 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7263.
When was CVE-2025-30347 published?: CVE-2025-30347 was published on 2025-03-21 and last updated on 2026-06-17.

References

https://docs.varnish-software.com/security/VEV00001/

Affected products (11)

cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r10:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r11:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r12:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r2:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r3:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r4:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r5:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r6:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r7:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r8:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r9:*:*:*:*:*:*

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

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CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

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