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CVE-2021-43449

Quick assessment

Affected
n/a n/a
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ascensio System ONLYOFFICE是拉脱维亚Ascensio System公司的一款办公软件。 ONLYOFFICE 2021-11-08 之前的所有版本存在安全漏洞，该漏洞源于易受服务器端请求伪造 (SSRF) 攻击。文档编辑器服务可能被滥用来读取任意 URL 并将其作为文档提供。

AI Predicted 8.1 Difficulty: Easy EPSS 1.25% · P68

Possible ATT&CK Techniques 1 AI

T1598 · Phishing for Information
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I. Basic Information for CVE-2021-43449

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Server-Side Request Forgery (SSRF). The document editor service can be abused to read and serve arbitrary URLs as a document.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
ONLYOFFICE 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ascensio System ONLYOFFICE是拉脱维亚Ascensio System公司的一款办公软件。 ONLYOFFICE 2021-11-08 之前的所有版本存在安全漏洞，该漏洞源于易受服务器端请求伪造 (SSRF) 攻击。文档编辑器服务可能被滥用来读取任意 URL 并将其作为文档提供。
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-2021-43449

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: SSRF - DocService fetched internal URL http://flagserver:8000/secret.xlsx and exfiltrated secret "PROOF_6b408c88532210cf" via converted CSV output
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 7386 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2021-43449

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Security Blog Posts for CVE-2021-43449 (1)

Vendor Pages for CVE-2021-43449 (1)

Other References for CVE-2021-43449 (1)

Same Patch Batch · n/a · 2023-01-23 · 27 CVEs total

CVE-2022-48281 LibTIFF 缓冲区错误漏洞
CVE-2023-24099 TRENDnet TEW-820AP 缓冲区错误漏洞
CVE-2023-24098 TRENDnet TEW-820AP 缓冲区错误漏洞
CVE-2023-24097 TRENDnet TEW-820AP 缓冲区错误漏洞
CVE-2023-24096 TRENDnet TEW-820AP 缓冲区错误漏洞
CVE-2023-24095 TRENDnet TEW-820AP 缓冲区错误漏洞
CVE-2023-24070 MISP 跨站脚本漏洞
CVE-2023-24069 Signal Desktop 安全漏洞
CVE-2023-24068 Signal Desktop 安全漏洞
CVE-2023-23560 Lexmark 代码问题漏洞
CVE-2023-23314 zdir 路径遍历漏洞
CVE-2023-22960 Lexmark 安全漏洞
CVE-2023-22630 IzyBat Orange casiers SQL注入漏洞
CVE-2021-43444 ONLYOFFICE 授权问题漏洞
CVE-2022-47065 TRENDnet TEW-820AP 缓冲区错误漏洞
CVE-2022-46959 Sonic 路径遍历漏洞
CVE-2022-46639 PrestaShop 路径遍历漏洞
CVE-2022-41505 TP-LINK Tapo C200 安全漏洞
CVE-2022-40034 Rawchen blog-ssm 跨站脚本漏洞
CVE-2022-38725 syslog-ng 输入验证错误漏洞

Showing top 20 of 27 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2021-43449

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