Is CVE-2016-4855 in the CISA KEV catalog?

No. CVE-2016-4855 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-4855?

CVE-2016-4855 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2016-4855?

CVE-2016-4855 has an EPSS score of 1.95% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-4855?

Upgrade libphp-adodb on debian 11 to 5.20.6-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2016-4855

MEDIUMEPSS 78th pctl

6.1

CVSS v3

NVD

Description

Cross-site scripting vulnerability in ADOdb versions prior to 5.20.6 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

libphp-adodbDebian

Fixed in:5.20.6-1CVE-2016-4855

libphp-adodbUbuntu

Fixed in:5.20.3-1ubuntu1+esm1USN-6825-1

Fixed in:5.20.9-1ubuntu0.1~esm1USN-6825-1

Fixed in:5.20.16-1ubuntu0.1~esm1USN-6825-1

Fixed in:5.20.19-1ubuntu0.1USN-6825-1

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

Exploit Intelligence

1.95%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Third-Party Advisory3

Other references1

security.gentoo.org

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 2026-05-13.