What’s Vulnerable › Vulnerabilities

CVE-2021-47827: WebSSH for iOS 14.16.10 - 'mashREPL' Denial of Service

• Severity: high (CVSS 7.5 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: none known
• Published: 2026-01-16 · updated 2026-06-17
• Weakness: CWE-1284

Description

WebSSH for iOS 14.16.10 contains a denial of service vulnerability in the mashREPL tool that allows attackers to crash the application by pasting malformed input. Attackers can trigger the vulnerability by copying a 300-character buffer of repeated 'A' characters into the mashREPL input field, causing the application to crash.

Affected products

• WebSSH for iOS: 14.16.10

References

• https://apps.apple.com/mx/app/webssh-ssh-client/id497714887
• https://www.exploit-db.com/exploits/49883
• https://www.vulncheck.com/advisories/webssh-for-ios-mashrepl-denial-of-service

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