Is CVE-2020-13959 in the CISA KEV catalog?

No. CVE-2020-13959 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-13959?

CVE-2020-13959 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2020-13959?

CVE-2020-13959 has an EPSS score of 6.36% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-13959?

Upgrade velocity-tools on debian 11 to 2.0-8 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-13959

MEDIUMEPSS 93th pctl

6.1

CVSS v3

NVD

Description

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.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

velocity-toolsDebian

Fixed in:2.0-8CVE-2020-13959

libvelocity-tools-javaUbuntu

Fixed in:2.0-4ubuntu0.1~esm1USN-6282-1

Fixed in:2.0-7ubuntu0.18.04.1~esm1USN-6282-1

Fixed in:2.0-7ubuntu0.20.04.1USN-6282-1

velocity-toolsUbuntu

Fixed in:2.0-4ubuntu0.1~esm1USN-6282-1

Fixed in:2.0-7ubuntu0.18.04.1~esm1USN-6282-1

Fixed in:2.0-7ubuntu0.20.04.1USN-6282-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Intelligence

6.36%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Vendor Advisory1

lists.apache.org

Third-Party Advisory3

Other references3

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

Embed a live status badge for CVE-2020-13959

Markdown

[![CVE-2020-13959](https://tridentstack.com/cve/badge/CVE-2020-13959.svg)](https://tridentstack.com/cve/CVE-2020-13959)

HTML

<a href="https://tridentstack.com/cve/CVE-2020-13959"><img src="https://tridentstack.com/cve/badge/CVE-2020-13959.svg" alt="CVE-2020-13959"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.