phpBB never actually blames anyone. They are always attacked for the same reason microsoft is: it's so popular. And, just like MS, they release a patch for their board as soon as the problem is found and solved.
phpBB can't be blamed for everything. It is the hosts job to keep PHP updated, as well as their software. A recent attack that was blamed on phpBB was not actually phpBB related, but AwStats. Hosts are just looking to point the blame, but don't want to point that finger at themselves for not updating their software.
Now, it is the webmasters job to update the forum (phpB😎 software, and by not running the latest version (2.0.13 as of Apr. 12, 2005), you are the only one to blame.
phpBB is not the problem, it's the users and hosts mainly. But when phpBB does have problems, they make sure to fix it. I have presonally never had a forum attacked and always check once per week for updates from phpBB. They have 5 different ways to let you know when updates are out, and if you don't use them, phpBB team can not be blamed for having "bad" software, or easily hacked software.
If the phpBB team could be blamed for each security flaw, do you think they'd still be around? If phpBB could be held responsible, why couldn't Microsoft; a company who makes you pay for their software? So Microsoft says that it's not their fault, but the users fault if they get hacked, as long as they're using the most up-to-date software. Same goes for phpBB. It is not their fault, unless you are running the most recent update to their software. Then you can report it, and an update will be released.
All [forum] software is the same: if you don't update it, you will be vulnerable to attack, no matter what [board] software you use. But, since you're looking for other software:
phpBB
phpBB is a high powered, fully scalable, and highly customizable Open Source bulletin board package. phpBB has a user-friendly interface, simple and straightforward administration panel, and helpful FAQ. Based on the powerful PHP server language and your choice of MySQL, MS-SQL, PostgreSQL or Access/ODBC database servers, phpBB is the ideal free community solution for all web sites.
Simple Machines Forum (SMF)
Elegant. Effective. Powerful. Free. SMF is all of the above. SMF is a next-generation community software package and is jam-packed with features, while at the same time having a minimal impact on resources. Some of our features include:
Comprehensive Themes: Not only can you control the default theme for your community, but you can also allow your users to select from a range of themes themselves.
Blazing-Fast Database: Not only do we make use of a MySQL back-end, but we've also gone to great lengths to ensure the database design is fast and efficient.
Secure File Attachments: Our special file-attaching system allows your users to attach files without fear of corrupting your system.
Automatic Mod Installation: Unique to SMF is our package manager - a system by which you can download and install upgrades and modifications with just a few mouse-clicks.
vBulletin
vBulletin is a powerful, scalable and fully customizable forums package for your web site. It has been written using the Web's quickest-growing scripting language; PHP, and is complimented with a highly efficient and ultra fast back-end database engine built using MySQL.
vBulletin is the ideal community solution for all medium-to-large sites.
MercuryBoard
MercuryBoard is a powerful message board system dedicated to raw speed with a mixture of features, ease of use, and ease of customization coupled with expandability, and diverse language services. Now just over two years in the making, version 1.0.0 is an immensely stable, thoroughly tested, and well-written piece of internet software ready for any webserver, running on PHP versions as low as 4.0.0 and MySQL versions as low as 3.22.
Ultimate PHP BB
UPB is a forum/message board script. It supports threaded discussion with a comprehesivetext database system that we wrote here at php outburst for the backend. We are almost at theend of getting rid of all the bugs associated with developing the forum. We strive of userimput because thats what really makes a good forum.
XMB Forum
XMB is a fully scalable, highly customizable Open Source message board software. XMB has a user-friendly interface, simple set up, stable performance, and tons of features. Based on the powerful PHP language and the MySQL database, XMB is a very powerful combination, suitable to everyone's needs.
bbBoard v2
bbBoard v2 is the best message board software available today. Guaranteed! With mind-blowing features, quick and helpful support whenever you need it, and constant upgrades, bbBoard v2 simply cannot be surpassed. And we're working hard every moment of every day to make sure it stays that way.
Zorum
Zorum is a message board software, which may be used with equal success on both intra- and internet sites. Zorum is a very basic software package that may be customized easily by adding or subtracting desired features. These modifications are done by our programers to suit the customization needs of our clients.
Phorum 5
Phorum is a web based message board written in PHP. Phorum is designed with high-availability and visitor ease of use in mind. Features such as mailing list integration, easy customization and simple installation make Phorum a powerful add-in to any website.
Invision Power Board (IP😎
Invision Power Board, an award-winning scaleable bulletin board system, allows you to effortlessly build, manage and promote your online community. Advanced yet intuitive features like multi-moderation allow you to focus on developing your community, rather than wrestling with complex settings.
Easy Forum
Easy Forum! is a good looking Discussion Board System written in PHP. Easy Forum! possesses a large number of useful features such as:
Extremely fast and easy-to-install
High performance, low bandwidth.
100% XHTML1.1/CSS2 compliant output
Full PHP3/PHP4/PHP5 compatibility
Up to 99 forums
Best viewed with any browser
Cell phones and PDA support via WAP
No MySQL database required
2 valid RSS/RDF feeds
Text formatting, HTML tags filter
Custom timezone settings
Different icons, smilies, 'http' links
Unrecognizable 'mailto' links
User registration
Backup/Restore, IP banning
Translated in 28 languages
10 pretty color schemes at choice
and many more...
Hope that helps.
~Brett