What is CVE-2015-3257?

CVE-2015-3257 is a medium-severity vulnerability in Zend Diactoros, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-08-25.

How severe is CVE-2015-3257?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Zend Diactoros

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-08-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Zend Diactoros

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

framework.zend.com/security/advisory/ZF2015-05 (Vendor Advisory)
www.securityfocus.com/bid/75466 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2015-3257?: CVE-2015-3257 is a medium-severity vulnerability in Zend Diactoros, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-08-25.
How severe is CVE-2015-3257?: Medium severity. CVSS v3 base score is 6.1 out of 10.