Is CVE-2015-8400 in the CISA KEV catalog?

No. CVE-2015-8400 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8400?

CVE-2015-8400 has a CVSS v3 base score of 7.4 (HIGH).

What is the EPSS score for CVE-2015-8400?

CVE-2015-8400 has an EPSS score of 2.04% (79th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8400?

Upgrade shellinabox on debian 11 to 2.19 or later.

CVE & CISA-KEV Catalog

CVE-2015-8400

HIGHEPSS 79th pctl

7.4

CVSS v3

NVD

Description

The HTTPS fallback implementation in Shell In A Box (aka shellinabox) before 2.19 makes it easier for remote attackers to conduct DNS rebinding attacks via the "/plain" URL.

CWE-254

How to fix

Remediation Available

shellinaboxDebian

Fixed in:2.19CVE-2015-8400

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

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N

Exploit Intelligence

2.04%probability of exploitation in 30 days

79thpercentile

Elevated risk: more likely to be exploited than 79% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Other references4

Related Vulnerabilities

Other CWE-254 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2016-0161	Medium	6.5	69%	-	-
CVE-2016-2296	Critical	9.4	64%	-	-
CVE-2015-1793	Medium	6.5	62%	-	Fix
CVE-2016-2118	High	7.5	37%	-	Fix
CVE-2016-3238	High	8.1	35%	-	-
CVE-2016-3198	Medium	6.5	32%	-	-

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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 2026-05-06.