CVE-2015-1786: Cross-site request forgery (CSRF) vulnerability in Zend/Validator/Csrf in Zend Framework 2.3.x before 2.3.6 vi

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HIGH 8.8DOWNGRADE

CVE-2015-1786 is a high-severity flaw (CVSS 8.8) affecting zend framework. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site request forgery (CSRF) vulnerability in Zend/Validator/Csrf in Zend Framework 2.3.x before 2.3.6 via null or malformed token identifiers.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-352
Published	2017-06-08
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: zend

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-06-08 21:29 UTCPublished CVE record published
2026-06-17 00:22 UTCUpdated Record last modified

zend zend framework DOWNGRADE

Affected: 2.3.0 · 2.3.1 · 2.3.2 · 2.3.3 · 2.3.4 · 2.3.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.0

1. Check installed version

apt-cache policy zend-framework || rpm -q zend-framework || zend-framework --version

2. No fixed release: DOWNGRADE to a release before 2.3.0 (Debian / Ubuntu)

apt-cache madison zend-framework sudo apt install zend-framework=<VERSION_BEFORE_2.3.0> sudo apt-mark hold zend-framework

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list zend-framework sudo dnf downgrade zend-framework-<VERSION_BEFORE_2.3.0> sudo dnf versionlock add zend-framework

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-1786?

zend framework: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-1786 being exploited?

CVE-2015-1786 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-1786 affect?

CVE-2015-1786 affects zend framework. Severity is high (CVSS 8.8). Cross-site request forgery (CSRF) vulnerability in Zend/Validator/Csrf in Zend Framework 2.3.x before 2.3.6 via null or malformed token identifiers.

How urgent is CVE-2015-1786?

Priority 44/100. High severity

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References

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