How severe is CVE-2015-3257?

CVE-2015-3257 has a CVSS 3.x base score of 6.1, rated medium 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 none.

Is CVE-2015-3257 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3257?

CVE-2015-3257 affects Zend Diactoros. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-3257?

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

When was CVE-2015-3257 published?

CVE-2015-3257 was published on 2017-08-25 and last updated on 2026-06-17.

CVE-2015-3257

CVE-2015-3257 is a medium-severity vulnerability in Zend Diactoros with a CVSS 3.x base score of 6.1. 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: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Zend Diactoros
Published: 2017-08-25
Last modified: 2026-06-17

Description

Zend/Diactoros/Uri::filterPath in zend-diactoros before 1.0.4 does not properly sanitize path input, which allows remote attackers to perform cross-site scripting (XSS) or open redirect attacks.

Frequently asked questions

What is CVE-2015-3257?: Zend/Diactoros/Uri::filterPath in zend-diactoros before 1.0.4 does not properly sanitize path input, which allows remote attackers to perform cross-site scripting (XSS) or open redirect attacks.
How severe is CVE-2015-3257?: CVE-2015-3257 has a CVSS 3.x base score of 6.1, rated medium 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 none.
Is CVE-2015-3257 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-3257?: CVE-2015-3257 affects Zend Diactoros. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-3257?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-3257 published?: CVE-2015-3257 was published on 2017-08-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:zend:diactoros:*:*:*:*:*:*:*:*

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