![]() An RCE vulnerability is automatically exploited in the background and leads to a full takeover of the targeted MyBB forum. (, 05:02 PM) Rs Wrote: just change the compatibility from 14 to 16 in the. (messages that do not have any of the words in any of. rss.embed - Opens a menu to customize an embed to be sent with the message (this will override the default embed that Discord sends when you post a link) rss.filters - Opens a menu to add or remove filters to a feed. "As soon as the administrator opens the private message, on his own trusted forum, the exploit triggers. rss.message - Opens a menu to customize the message for a specific feed. "A sophisticated attacker could develop an exploit for the Stored XSS vulnerability and then send a private message to a targeted administrator of a MyBB board," the researchers outlined in a technical write-up. ![]() A successful exploitation occurs when a forum administrator with the "Can manage themes?" permission imports a maliciously crafted theme, or a user, for whom the theme has been set, visits a forum page. The second vulnerability concerns an SQL injection ( CVE-2021-27890) in a forum's theme manager that could result in an authenticated RCE. as a post or Private Message) and pointing a victim to a page where the content is parsed," MyBB said in an advisory. With tutorials, helpful members, and millions of posts you too can learn skills. "The vulnerability can be exploited with minimal user interaction by saving a maliciously crafted M圜ode message on the server (e.g. Hack Forums is your gateway into the world of hacking and cybersecurity. ![]() According to the researchers, the first issue - a nested auto URL persistent XSS vulnerability (CVE-2021-27889) - stems from how MyBB parses messages containing URLs during the rendering process, thus enabling any unprivileged forum user to embed stored XSS payloads into threads, posts, and even private messages.
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