Is CVE-2020-13639 in the CISA KEV catalog?

No. CVE-2020-13639 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-13639?

CVE-2020-13639 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2020-13639?

CVE-2020-13639 has an EPSS score of 0.82% (53th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-13639?

Upgrade lifetime management console to 11.7.0 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-13639

MEDIUM

6.1

CVSS v3

NVD

Description

A stored XSS vulnerability was discovered in the ECT Provider in OutSystems before 2020-09-04, affecting generated applications. It could allow an unauthenticated remote attacker to craft and store malicious Feedback content into /ECT_Provider/, such that when the content is viewed (it can only be viewed by Administrators), attacker-controlled JavaScript will execute in the security context of an administrator's browser. This is fixed in Outsystems 10.0.1005.2, Outsystems 11.9.0 Platform Server, and Outsystems 11.7.0 LifeTime Management Console.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

lifetime management consoleNVD

Affected:>= 11, < 11.7.0Fixed in:11.7.0CVE-2020-13639derived from NVD

outsystemsNVD

Affected:>= 10, < 10.0.1005.2Fixed in:10.0.1005.2CVE-2020-13639derived from NVD

platform serverNVD

Affected:>= 11, < 11.9.0Fixed in:11.9.0CVE-2020-13639derived from NVD

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

0.82%probability of exploitation in 30 days

53rdpercentile

Moderate risk: more likely to be exploited than 53% of all known CVEs.

References

Third-Party Advisory1

labs.integrity.pt

Product1

outsystems.com

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

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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.