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Vulnerability record · CVE-2017-16780 · published 10 November 2017

CVE-2017-16780: Mybb cross-site request forgery vulnerability

Mybb · Mybb

The installer in MyBB before 1.8.13 allows remote attackers to execute arbitrary code by writing to the configuration file.

9.8 CVSS 3.0 Critical EPSS 5.8% · top 7.2% CWE-352 · Cross-site request forgery
9.8CVSS 3.0 base score, v2 7.5
5.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The installer in MyBB before 1.8.13 allows remote attackers to execute arbitrary code by writing to the configuration file.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.mybb.com/2017/11/07/mybb-1-8-13-released-security-maintenance-release/ Release NotesVendor Advisory
https://www.exploit-db.com/exploits/43136/ ExploitThird Party AdvisoryVDB Entry
https://blog.mybb.com/2017/11/07/mybb-1-8-13-released-security-maintenance-release/ Release NotesVendor Advisory
https://www.exploit-db.com/exploits/43136/ ExploitThird Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2011-10018Mybb code injection vulnerabilitymyBB version 1.6.4 was distributed with an unauthorized backdoor embedded in the source code. The backdoor allowed remote attackers to execute arbitr…EPSS 2.0%10.0CVE-2015-8974Mybb merge system sql injection vulnerabilitySQL 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.…EPSS 2.1%10.0CVE-2015-2786Mybb vulnerabilityUnspecified vulnerability in MyBB (aka MyBulletinBoard) before 1.8.4 has unknown attack vectors related to "Group join request notifications sent to …EPSS 1.4%10.0CVE-2011-5133Mybb vulnerabilityUnspecified vulnerability in MyBB before 1.6.5 has unknown impact and attack vectors, related to an "unparsed user avatar in the buddy list."EPSS 1.7%10.0CVE-2006-0218Mybb vulnerabilityMultiple unspecified vulnerabilities in MyBulletinBoard (MyBB) before 1.0.2 have unspecified impact and attack vectors, related to (1) admin/moderate…EPSS 1.2%9.8CVE-2020-22612Mybb code injection vulnerabilityInstaller RCE on settings file write in MyBB before 1.8.22.EPSS 0.73%9.8CVE-2016-9402Mybb merge system sql injection vulnerabilitySQL 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 a…EPSS 2.1%9.8CVE-2016-9403Mybb merge system permissions and access controls vulnerabilitynewreply.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 leve…EPSS 2.6%

Source: NIST National Vulnerability Database (record CVE-2017-16780), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.