ZF2010-06: Potential XSS or HTML Injection vector in Zend_Json
Zend_Json_Encoder was not taking into account the solidus
character ("/") during encoding, leading to incompatibilities with the
JSON specification, and opening the potential for XSS or HTML injection
attacks when returning HTML within a JSON string.
Zend_Json_Encoder was patched to escape the solidus character
when encoding PHP strings to JSON.
This particular vulnerability only affects those users who are either (a)
Zend_Json_Encoder directly, (b) requesting native encoding
instead of usage of ext/json (e.g., by enabling the static
$useBuiltinEncoderDecoder property of
or (c) on systems where ext/json is unavailable (e.g. RHEL, CentOS). If you
are affected, we strongly recommend upgrading to the latest available Zend
Framework release, or one of the following releases, immediately.
The Zend Framework team thanks the following for working with us to help protect its users:
- Pádraic Brady, who made the initial report and who worked with our team to ensure that the appropriate actions were taken
Reporting Potential Security Issues
If you have encountered a potential security vulnerability in Zend Framework, please report it to us at email@example.com. We will work with you to verify the vulnerability and patch it.
When reporting issues, please provide the following information:
- Component(s) affected
- A description indicating how to reproduce the issue
- A summary of the security vulnerability and impact
We request that you contact us via the email address above and give the project contributors a chance to resolve the vulnerability and issue a new release prior to any public exposure; this helps protect Zend Framework users and provides them with a chance to upgrade and/or update in order to protect their applications.
For sensitive email communications, please use our PGP key.
Zend Framework takes security seriously. If we verify a reported security vulnerability, our policy is:
- We will patch the current release branch, as well as the immediate prior minor release branch.
- After patching the release branches, we will immediately issue new security fix releases for each patched release branch.
- A security advisory will be released on the Zend Framework site detailing the vulnerability, as well as recommendations for end-users to protect themselves. Security advisories will be listed at http://framework.zend.com/security/advisories, as well as via a feed (which is also present in the website head for easy feed discovery)