THREATPORT/VULNERABILITY/CVE-2021-26291
CRITICAL SEVERITY

CVE-2021-26291

Maven vulnerability

CVSS
9.1
EPSS
8.7%
EPSS pct
95th
Exploited
No known
Apache Maven will follow repositories that are defined in a dependency’s Project Object Model (pom) which may be surprising to some users, resulting in potential risk if a malicious actor takes over that repository or is able to insert themselves into a position to pretend to be that repository. Maven is changing the default behavior in 3.8.1+ to no longer follow http (non-SSL) repository references by default. More details available in the referenced urls. If you are currently using a repository manager to govern the repositories used by your builds, you are unaffected by the risks present in the legacy behavior, and are unaffected by this vulnerability and change to default behavior. See this link for more information about repository management: https://maven.apache.org/repository-management.html
Affected vendor
Apache
Affected product
Maven
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness type (CWE)
  • CWE-346 — Origin Validation Error
Published
2021-04-23

Risk analysis

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

Its EPSS score of 8.7% reflects a lower 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-2021-26291

  • Confirm whether Apache Maven is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-26291.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-26291

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-26291 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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