What’s Vulnerable › Vulnerabilities

CVE-2021-31155

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-27 · updated 2026-06-17
• Weakness: CWE-732

Description

Failure to normalize the umask in please before 0.4 allows a local attacker to gain full root privileges if they are allowed to execute at least one command.

Affected products

• Umask Project Umask: before 0.4 — fixed in 0.4

How to fix

Upgrade to a fixed version: Umask Project Umask 0.4. Check the vendor advisory for mitigations.

References

• https://gitlab.com/edneville/please/-/tree/master/src/bin
• https://www.openwall.com/lists/oss-security/2021/05/18/1
• https://gitlab.com/edneville/please/-/tree/master/src/bin
• https://www.openwall.com/lists/oss-security/2021/05/18/1

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