Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2023-34253— Grav vulnerable to Server-side Template Injection (SSTI) via Denylist Bypass

CVSS 8.8 · High EPSS 2.10% · P84
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2023-34253

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Grav vulnerable to Server-side Template Injection (SSTI) via Denylist Bypass
Source: NVD (National Vulnerability Database)
Vulnerability Description
Grav is a flat-file content management system. Prior to version 1.7.42, the denylist introduced in commit 9d6a2d to prevent dangerous functions from being executed via injection of malicious templates was insufficient and could be easily subverted in multiple ways -- (1) using unsafe functions that are not banned, (2) using capitalised callable names, and (3) using fully-qualified names for referencing callables. Consequently, a low privileged attacker with login access to Grav Admin panel and page creation/update permissions is able to inject malicious templates to obtain remote code execution. A patch in version 1.7.42 improves the denylist.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不完整的黑名单
Source: NVD (National Vulnerability Database)
Vulnerability Title
Grav 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grav是一套可扩展的用于个人博客、小型内容发布平台和单页产品展示的CMS（内容管理系统）。 Grav 1.7.42之前版本存在安全漏洞，该漏洞源于存在服务器端模板注入 (SSTI)漏洞，允许攻击者通过注入恶意模板来执行远程代码。
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

VendorProductAffected VersionsCPESubscribe
getgravgrav < 1.7.42 -

II. Public POCs for CVE-2023-34253

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2023-34253

请登录查看更多情报信息。

Same Patch Batch · getgrav · 2023-06-14 · 5 CVEs total

CVE-2023-3425110.0 CRITICALGrav Server Side Template Injection vulnerability
CVE-2023-344488.8 HIGHGrav Server-side Template Injection (SSTI) via Twig Default Filters
CVE-2023-342528.8 HIGHGrav Server-side Template Injection via Insufficient Validation in filterFilter
CVE-2023-344525.4 MEDIUMGrav vulnerable to Self Cross Site Scripting in /forgot_password

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-184

V. Comments for CVE-2023-34253

No comments yet

Leave a comment