CVE-2020-5280

Q: How do I fix CVE-2020-5280?

Upgrade http4s to 0.21.2 or later.

Q: Is CVE-2020-5280 being actively exploited?

Not that we know of. CVE-2020-5280 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 6.8% is the estimated probability that it will be exploited in the next 30 days. That is higher than 93% of all scored CVEs.

Q: How severe is CVE-2020-5280?

CVE-2020-5280 has a CVSS v3 base score of 7.6, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2020-5280 affect?

Published advisories record a fix for http4s (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGHEPSS 93th pctl

7.6

CVSS v3

NVD

Description

http4s before versions 0.18.26, 0.20.20, and 0.21.2 has a local file inclusion vulnerability. This vulnerability applies to all users of org.http4s.server.staticcontent.FileService, org.http4s.server.staticcontent.ResourceService and org.http4s.server.staticcontent.WebjarService. URI normalization is applied incorrectly. Requests whose path info contain ../ or // can expose resources outside of the configured location. This issue is patched in versions 0.18.26, 0.20.20, and 0.21.2. Note that 0.19.0 is a deprecated release and has never been supported.

CWE-23 CWE-22Path Traversal

How to fix

Remediation Available

http4sNVD

Affected:>= 0.21.0, < 0.21.2Fixed in:0.21.2CVE-2020-5280derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

6.82%probability of exploitation in 30 days

93rdpercentile

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

References

Patch3

Third-Party Advisory1

github.com

Related Vulnerabilities

Other CWE-23 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-27199	High	7.3	100%	KEV + Ransom	Fix
CVE-2020-5410	High	7.5	96%	KEV	Fix
CVE-2021-40870	Critical	9.8	93%	KEV	Fix
CVE-2025-64446	Critical	9.8	92%	KEV	Fix
CVE-2020-5405	Medium	6.5	69%	-	Fix
CVE-2025-55752	High	7.5	67%	-	Fix

Common questions

How do I fix CVE-2020-5280?

Upgrade http4s to 0.21.2 or later.

Is CVE-2020-5280 being actively exploited?

Not that we know of. CVE-2020-5280 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 6.8% is the estimated probability that it will be exploited in the next 30 days. That is higher than 93% of all scored CVEs.

How severe is CVE-2020-5280?

CVE-2020-5280 has a CVSS v3 base score of 7.6, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2020-5280 affect?

Published advisories record a fix for http4s (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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.