Mybb
by MyBB
Source repositories
CVEs (201)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2011-10018 | Cri | 0.67 | 9.8 | 0.02 | Aug 13, 2025 | myBB version 1.6.4 was distributed with an unauthorized backdoor embedded in the source code. The backdoor allowed remote attackers to execute arbitrary PHP code by injecting payloads into a specially crafted collapsed cookie. This vulnerability was introduced during packaging… | ||
| CVE-2017-16780 | Cri | 0.67 | 9.8 | 0.06 | Nov 10, 2017 | The installer in MyBB before 1.8.13 allows remote attackers to execute arbitrary code by writing to the configuration file. | ||
| CVE-2015-8974 | Cri | 0.65 | 10.0 | 0.02 | Jan 31, 2017 | SQL injection vulnerability in the Group Promotions module in the admin control panel in MyBB (aka MyBulletinBoard) before 1.6.18 and 1.8.x before 1.8.6 and MyBB Merge System before 1.8.6 allows remote attackers to execute arbitrary SQL commands via unspecified vectors. | ||
| CVE-2020-22612 | Cri | 0.64 | 9.8 | 0.01 | Sep 1, 2023 | Installer RCE on settings file write in MyBB before 1.8.22. | ||
| CVE-2016-9420 | Cri | 0.64 | 9.8 | 0.03 | Jan 31, 2017 | MyBB (aka MyBulletinBoard) before 1.8.8 and MyBB Merge System before 1.8.8 allow remote attackers to have unspecified impact via vectors related to "loose comparison false positives." | ||
| CVE-2016-9416 | Cri | 0.64 | 9.8 | 0.02 | Jan 31, 2017 | SQL injection vulnerability in the users data handler in MyBB (aka MyBulletinBoard) before 1.8.8 and MyBB Merge System before 1.8.8 allows remote attackers to execute arbitrary SQL commands via unspecified vectors. | ||
| CVE-2016-9412 | Cri | 0.64 | 9.8 | 0.02 | Jan 31, 2017 | MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 allow attackers to have unspecified impact via vectors related to low adminsid and sid entropy. | ||
| CVE-2016-9403 | Cri | 0.64 | 9.8 | 0.03 | Jan 31, 2017 | newreply.php in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 allows remote attackers to have unspecified impact by leveraging a missing permission check. | ||
| CVE-2016-9402 | Cri | 0.64 | 9.8 | 0.02 | Jan 31, 2017 | SQL injection vulnerability in the moderation tool in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 might allow remote attackers to execute arbitrary SQL commands via unspecified vectors. | ||
| CVE-2021-27946 | Hig | 0.61 | 8.8 | 0.04 | Mar 15, 2021 | SQL Injection vulnerability in MyBB before 1.8.26 via poll vote count. (issue 1 of 3). | ||
| CVE-2021-27890 | Hig | 0.61 | 8.8 | 0.11 | Mar 15, 2021 | SQL Injection vulnerablity in MyBB before 1.8.26 via theme properties included in theme XML files. | ||
| CVE-2026-45117 | Cri | 0.57 | 9.8 | 0.01 | Aug 18, 2026 | MyBB is free and open source forum software. From 1.8.13 until 1.8.40, the installer module does not properly escape user-supplied database configuration values written to the configuration file, resulting in PHP code injection and remote code execution when the installer is… | ||
| CVE-2023-53979 | Hig | 0.57 | 8.8 | 0.01 | Dec 22, 2025 | MyBB 1.8.32 contains a chained vulnerability that allows authenticated administrators to bypass avatar upload restrictions and execute arbitrary code. Attackers can modify upload path settings, upload a malicious PHP-embedded image file, and execute commands through the language… | ||
| CVE-2020-15139 | Hig | 0.57 | 8.8 | 0.01 | Aug 10, 2020 | In MyBB before version 1.8.24, the custom MyCode (BBCode) for the visual editor doesn't escape input properly when rendering HTML, resulting in a DOM-based XSS vulnerability. The weakness can be exploited by pointing a victim to a page where the visual editor is active (e.g. as… | ||
| CVE-2019-12830 | Hig | 0.57 | 8.7 | 0.01 | Jun 15, 2019 | In MyBB before 1.8.21, an attacker can exploit a parsing flaw in the Private Message / Post renderer that leads to [video] BBCode persistent XSS to take over any forum account, aka a nested video MyCode issue. | ||
| CVE-2015-8973 | Hig | 0.54 | 8.3 | 0.02 | Jan 31, 2017 | xmlhttp.php in MyBB (aka MyBulletinBoard) before 1.6.18 and 1.8.x before 1.8.6 and MyBB Merge System before 1.8.6 allows remote attackers to bypass intended access restrictions via vectors related to the forum password. | ||
| CVE-2026-45118 | Cri | 0.53 | 9.3 | 0.01 | Aug 18, 2026 | MyBB is free and open source forum software. Prior to 1.8.40, the Contact module does not validate a redirect URL or protocol correctly, resulting in an open redirect and reflected JavaScript code injection. contact.php accepts the redirect target from the from HTTP parameter in… | ||
| CVE-2026-45116 | Hig | 0.50 | 8.7 | 0.00 | Aug 18, 2026 | MyBB is free and open source forum software. Prior to 1.8.40, the user datahandler does not properly validate checkbox and multiselect profile field types, resulting in stored JavaScript code injection. UserDataHandler::verify_profile_fields() only performs the specialized… | ||
| CVE-2026-45115 | Hig | 0.50 | 8.7 | 0.00 | Aug 18, 2026 | MyBB is free and open source forum software. Prior to 1.8.40, the Buddy/Ignore component does not sanitize usernames correctly, allowing attackers to perform JavaScript code injection through a specially crafted username. The User CP Buddy/Ignore list and the Select Buddies list… | ||
| CVE-2017-7566 | Hig | 0.50 | 7.7 | 0.02 | Apr 6, 2017 | MyBB before 1.8.11 allows remote attackers to bypass an SSRF protection mechanism. |
- risk 0.67cvss 9.8epss 0.02
myBB version 1.6.4 was distributed with an unauthorized backdoor embedded in the source code. The backdoor allowed remote attackers to execute arbitrary PHP code by injecting payloads into a specially crafted collapsed cookie. This vulnerability was introduced during packaging…
- risk 0.67cvss 9.8epss 0.06
The installer in MyBB before 1.8.13 allows remote attackers to execute arbitrary code by writing to the configuration file.
- risk 0.65cvss 10.0epss 0.02
SQL injection vulnerability in the Group Promotions module in the admin control panel in MyBB (aka MyBulletinBoard) before 1.6.18 and 1.8.x before 1.8.6 and MyBB Merge System before 1.8.6 allows remote attackers to execute arbitrary SQL commands via unspecified vectors.
- risk 0.64cvss 9.8epss 0.01
Installer RCE on settings file write in MyBB before 1.8.22.
- risk 0.64cvss 9.8epss 0.03
MyBB (aka MyBulletinBoard) before 1.8.8 and MyBB Merge System before 1.8.8 allow remote attackers to have unspecified impact via vectors related to "loose comparison false positives."
- risk 0.64cvss 9.8epss 0.02
SQL injection vulnerability in the users data handler in MyBB (aka MyBulletinBoard) before 1.8.8 and MyBB Merge System before 1.8.8 allows remote attackers to execute arbitrary SQL commands via unspecified vectors.
- risk 0.64cvss 9.8epss 0.02
MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 allow attackers to have unspecified impact via vectors related to low adminsid and sid entropy.
- risk 0.64cvss 9.8epss 0.03
newreply.php in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 allows remote attackers to have unspecified impact by leveraging a missing permission check.
- risk 0.64cvss 9.8epss 0.02
SQL injection vulnerability in the moderation tool in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 might allow remote attackers to execute arbitrary SQL commands via unspecified vectors.
- risk 0.61cvss 8.8epss 0.04
SQL Injection vulnerability in MyBB before 1.8.26 via poll vote count. (issue 1 of 3).
- risk 0.61cvss 8.8epss 0.11
SQL Injection vulnerablity in MyBB before 1.8.26 via theme properties included in theme XML files.
- risk 0.57cvss 9.8epss 0.01
MyBB is free and open source forum software. From 1.8.13 until 1.8.40, the installer module does not properly escape user-supplied database configuration values written to the configuration file, resulting in PHP code injection and remote code execution when the installer is…
- risk 0.57cvss 8.8epss 0.01
MyBB 1.8.32 contains a chained vulnerability that allows authenticated administrators to bypass avatar upload restrictions and execute arbitrary code. Attackers can modify upload path settings, upload a malicious PHP-embedded image file, and execute commands through the language…
- risk 0.57cvss 8.8epss 0.01
In MyBB before version 1.8.24, the custom MyCode (BBCode) for the visual editor doesn't escape input properly when rendering HTML, resulting in a DOM-based XSS vulnerability. The weakness can be exploited by pointing a victim to a page where the visual editor is active (e.g. as…
- risk 0.57cvss 8.7epss 0.01
In MyBB before 1.8.21, an attacker can exploit a parsing flaw in the Private Message / Post renderer that leads to [video] BBCode persistent XSS to take over any forum account, aka a nested video MyCode issue.
- risk 0.54cvss 8.3epss 0.02
xmlhttp.php in MyBB (aka MyBulletinBoard) before 1.6.18 and 1.8.x before 1.8.6 and MyBB Merge System before 1.8.6 allows remote attackers to bypass intended access restrictions via vectors related to the forum password.
- risk 0.53cvss 9.3epss 0.01
MyBB is free and open source forum software. Prior to 1.8.40, the Contact module does not validate a redirect URL or protocol correctly, resulting in an open redirect and reflected JavaScript code injection. contact.php accepts the redirect target from the from HTTP parameter in…
- risk 0.50cvss 8.7epss 0.00
MyBB is free and open source forum software. Prior to 1.8.40, the user datahandler does not properly validate checkbox and multiselect profile field types, resulting in stored JavaScript code injection. UserDataHandler::verify_profile_fields() only performs the specialized…
- risk 0.50cvss 8.7epss 0.00
MyBB is free and open source forum software. Prior to 1.8.40, the Buddy/Ignore component does not sanitize usernames correctly, allowing attackers to perform JavaScript code injection through a specially crafted username. The User CP Buddy/Ignore list and the Select Buddies list…
- risk 0.50cvss 7.7epss 0.02
MyBB before 1.8.11 allows remote attackers to bypass an SSRF protection mechanism.
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