Vulnerability in Webssh For iOS
CVE-2021-47827
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Webssh For iOS — versions 14.16.10
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49883 (exploit)
- apps.apple.com/mx/app/webssh-ssh-client/id497714887 (product)
- www.vulncheck.com/advisories/webssh-for-ios-mashrepl-denial-of-service (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47827?
- CVE-2021-47827 is a high-severity vulnerability in Webssh For iOS, classified under Improper Validation of Specified Quantity in Input. CVSS score: 7.5/10. Published 2026-01-16.
- How severe is CVE-2021-47827?
- High severity. CVSS v3 base score is 7.5 out of 10.