01 May 2020
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT Security Bulletin ASB-2020.0094 WordPress 5.4.1 Security and Maintenance Release 1 May 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Wordpress Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Cross-site Scripting -- Remote with User Interaction Access Confidential Data -- Remote/Unauthenticated Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade Member content until: Sunday, May 31 2020 OVERVIEW A number of vulnerabilities have been identified in WordPress prior to version 5.4.1.  IMPACT The vendor has provided the following information: "WordPress 5.4.1 is now available! This security and maintenance release features 17 bug fixes in addition to 7 security fixes. Because this is a security release , it is recommended that you update your sites immediately. All versions since WordPress 3.7 have also been updated. WordPress 5.4.1 is a short-cycle security and maintenance release. The next major release will be version 5.5. You can download WordPress 5.4.1 by downloading from WordPress.org, or visit your Dashboard -> Updates and click Update Now. If you have sites that support automatic background updates, they've already started the update process. Security Updates Seven security issues affect WordPress versions 5.4 and earlier. If you haven't yet updated to 5.4, all WordPress versions since 3.7 have also been updated to fix the following security issues: o Props to Muaz Bin Abdus Sattar and Jannes who both independently reported an issue where password reset tokens were not properly invalidated o Props to ka1n4t for finding an issue where certain private posts can be viewed unauthenticated o Props to Evan Ricafort for discovering an XSS issue in the Customizer o Props to Ben Bidner from the WordPress Security Team who discovered an XSS issue in the search block o Props to Nick Daugherty from WordPress VIP / WordPress Security Team who discovered an XSS issue in wp-object-cache o Props to Ronnie Goodrich ( Kahoots ) and Jason Medeiros who independently reported an XSS issue in file uploads. o Props to Weston Ruter for fixing a stored XSS vulnerability in the WordPress customizer. o Additionally, an authenticated XSS issue in the block editor was discovered by Nguyen the Duc in WordPress 5.4 RC1 and RC2. It was fixed in 5.4 RC5. We wanted to be sure to give credit and thank them for all of their work in making WordPress more secure."  MITIGATION Wordpress recommends upgrading to the version 5.4.1 to fix these issues.  REFERENCES  WordPress 5.4.1 https://wordpress.org/news/2020/04/wordpress-5-4-1/ 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: email@example.com 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. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXqucY2aOgq3Tt24GAQgYwhAAutMY7isn/oASAqBUvzDBOakp/yg8MUpA 77A5O9M5JIlwHKVDO4pOJGhsbSLwHwhuHZV0W7QmKnuAzY6Q/Y2/LHrBevUsV6T3 jbPBDBTJ/p8SHwmlqvHg3jPLuBk0FeI7gSY36NKRsUCG1bvziKaHDRWFm5Z8ODHl fVW8oquOq79tbC0cdlxgnQPSKjl+tHCtCVcgiauS9uGauGIAtfWcOV58hZEixamc /BoTqA44FB6HG3jNM36ZGGNMMBC+vK1wSGwgLyzN8CHvVL+oWSCT3ujAAm8JneaT 0y7lmiv3PYsJkQyPTIHRr3HTrCp75I8AFw58MSZpjGUe1FQEXxHWiJyqvtT49wfi wqWFrDJ60hNMGqBkcY9sC/OMjW2L4paNAHtX50w+1x08zwnIBLrVNaTySziMUCBr M4PaCKvy2pRg0BCcJrOG2D14XdUA+f9nTcord9WWU4H2JamAHmrt2RQoRKaMECky W4VKZVfzKbmYJurjSNQUdkVre24w8WOLYqjn37CLuV30Z/qPEh1btOvuRFVr11k2 dKgFTvHpftMHfk4DYr7a095dRKNQRNJA4Q0AEhotHqRpRPc4p7CBYfnyb83s/PB6 58xnzqtIB/NLW2bqxamrHHXieNKCETltTKxXh5pFucFC1ubUKoyuoRGiOt4zSbQ4 EDjraqzxYls= =Yqjs -----END PGP SIGNATURE-----