THREATPORT/VULNERABILITY/CVE-2021-29425
MEDIUM SEVERITY

CVE-2021-29425

Commons Io vulnerability

CVSS
4.8
EPSS
10.6%
EPSS pct
95th
Exploited
No known
In Apache Commons IO before 2.7, When invoking the method FileNameUtils.normalize with an improper input string, like "//../foo", or "\\..\foo", the result would be the same value, thus possibly providing access to files in the parent directory, but not further above (thus "limited" path traversal), if the calling code would use the result to construct a path value.
Affected vendor
Apache
Affected product
Commons Io
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness type (CWE)
  • CWE-20 — Improper Input Validation
  • CWE-22 — Path Traversal
Published
2021-04-13

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity.

Its EPSS score of 10.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2021-29425

  • Confirm whether Apache Commons Io is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-29425.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-29425

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