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                         AUSCERT Security Bulletin

                               ASB-2016.0052
            A number of vulnerabilities have been identified in
                     WordPress prior to version 4.5.2.
                                9 May 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              WordPress
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact/Access:        Cross-site Scripting -- Remote with User Interaction
                      Unauthorised Access  -- Remote/Unauthenticated      
Resolution:           Patch/Upgrade
Member content until: Wednesday, June  8 2016

OVERVIEW

        A number of vulnerabilities have been identified in WordPress prior
        to version 4.5.2. [1]


IMPACT

        The vendor has provided the following details regarding these 
        issues:
        
        "WordPress versions 4.5.1 and earlier are affected by a SOME 
        vulnerability through Plupload, the third-party library WordPress 
        uses for uploading files. WordPress versions 4.2 through 4.5.1 are 
        vulnerable to reflected XSS using specially crafted URIs through 
        MediaElement.js, the third-party library used for media players. 
        MediaElement.js and Plupload have also released updates fixing these
        issues.
        
        Both issues were analyzed and reported by Mario Heiderich, Masato 
        Kinugawa, and Filedescriptor from Cure53. Thanks to the team for 
        practicing responsible disclosure, and to the Plupload and 
        MediaElement.js teams for working closely with us to coordinate and
        fix these issues." [1]


MITIGATION

        The vendor recommends updating to version 4.5.2 of WordPress to 
        correct these issues. [1]


REFERENCES

        [1] WordPress 4.5.2 Security Release
            https://wordpress.org/news/2016/05/wordpress-4-5-2/

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours 
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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