CVE-2021-27116 Privilege escalation in beego

What is CVE-2021-27116?

CVE-2021-27116 is a high-severity path traversal vulnerability in n/a, published on 5 Apr 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in file profile.go in function MemProf in beego through 2.0.2, allows attackers to launch symlink attacks locally.

Weakness: CWE-59

Which versions are affected by CVE-2021-27116?

4 open source packages ship an affected version, including github.com/beego/beego and github.com/beego/beego/v2. It affects 1 product.

Products include Beego Beego.

How do I fix CVE-2021-27116?

Upgrade to a fixed version.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2021-27116 being exploited?

There is no known exploitation of CVE-2021-27116 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2022-31836 Path Traversal in Beego Critical 9.8
• CVE-2022-31259 Access control bypass in beego Critical 9.8
• CVE-2021-30080 Access control bypass in Beego Critical 9.8
• CVE-2025-30223 Beego allows Reflected/Stored XSS in Beego's RenderForm() Function Due to Unescaped User Input Critical 9.3
• CVE-2024-40464 Beego privilege escalation vulnerability High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-ffjp-66mx-3qpj.