THREATPORT/VULNERABILITY/CVE-2020-13959
MEDIUM SEVERITY

CVE-2020-13959

Velocity Tools vulnerability

CVSS
6.1
EPSS
6.4%
EPSS pct
93th
Exploited
No known
The default error page for VelocityView in Apache Velocity Tools prior to 3.1 reflects back the vm file that was entered as part of the URL. An attacker can set an XSS payload file as this vm file in the URL which results in this payload being executed. XSS vulnerabilities allow attackers to execute arbitrary JavaScript in the context of the attacked website and the attacked user. This can be abused to steal session cookies, perform requests in the name of the victim or for phishing attacks.
Affected vendor
Apache
Affected product
Velocity Tools
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness type (CWE)
  • CWE-79 — Cross-Site Scripting (XSS)
Published
2021-03-10

Risk analysis

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

Its EPSS score of 6.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2020-13959

  • Confirm whether Apache Velocity Tools is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2020-13959.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-13959

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-13959 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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