CVE-2019-12831
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I. Basic Information for CVE-2019-12831
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
In MyBB before 1.8.21, an attacker can abuse a default behavior of MySQL on many systems (that leads to truncation of strings that are too long for a database column) to create a PHP shell in the cache directory of a targeted forum via a crafted XML import, as demonstrated by truncation of aaaaaaaaaaaaaaaaaaaaaaaaaa.php.css to aaaaaaaaaaaaaaaaaaaaaaaaaa.php with a 30-character limit, aka theme import stylesheet name RCE.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
MyBB 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MyBB（MyBulletinBoard）是MyBB团队的开发的一套用PHP和MySQL开发的免费且基于Web的论坛软件。该软件具有简单易用、支持多国语言、可扩展等特点。 MyBB 1.8.21之前版本中存在输入验证错误漏洞。攻击者可利用该漏洞在目标论坛的缓存目录中创建PHP shell。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | n/a | n/a | - |
II. Public POCs for CVE-2019-12831
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://blog.ripstech.com/2019/mybb-stored-xss-to-rce/x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2019-12831
Same Patch Batch · n/a · 2019-06-15 · 8 CVEs total
| CVE-2013-7472 | WordPress Count per Day插件跨站脚本漏洞 | |
| CVE-2019-12840 | Webmin 操作系统命令注入漏洞 | |
| CVE-2019-12839 | OrangeHRM 命令注入漏洞 | |
| CVE-2019-12835 | Leanify 缓冲区错误漏洞 | |
| CVE-2019-12830 | MyBB 跨站脚本漏洞 | |
| CVE-2019-12829 | radare2 缓冲区错误漏洞 | |
| CVE-2019-12816 | ZNC 权限许可和访问控制问题漏洞 |
IV. Related Vulnerabilities
Same vendor: n/a
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Open5GS AUSF nausf-handler.c ogs_timer_add denial of service - CVE-2026-8744
Open5GS NRF context.c ogs_sbi_nf_service_add denial of servi - CVE-2026-8743
Open5GS AMF/MME context.c ran_ue_find_by_amf_ue_ngap_id impr
V. Comments for CVE-2019-12831
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