CVE-2016-4855: Cross-site scripting vulnerability in ADOdb versions prior to 5.20.6 allows remote attackers to inject arbitra

Q: How do I fix CVE-2016-4855?

adodb: upgrade to newer than 5.20.5. Exact commands for each OS are on this page.

Q: Is CVE-2016-4855 being exploited?

CVE-2016-4855 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2016-4855 affect?

CVE-2016-4855 affects adodb. Severity is medium (CVSS 6.1). 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.

Q: How urgent is CVE-2016-4855?

Priority 41/100. No elevated risk signals yet.

This month

MEDIUM 6.1UPGRADE

CVE-2016-4855 is a medium-severity flaw (CVSS 6.1) affecting adodb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-79
Published	2017-05-12
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: adodb project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-05-12 18:29 UTCPublished CVE record published
2026-06-17 00:48 UTCUpdated Record last modified

adodb project adodb UPGRADE

Affected: <= 5.20.5

Fixed in: newer than 5.20.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy adodb || rpm -q adodb || adodb --version

2. UPGRADE to newer than 5.20.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade adodb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade adodb

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2016-4855?

adodb: upgrade to newer than 5.20.5. Exact commands for each OS are on this page.

Is CVE-2016-4855 being exploited?

CVE-2016-4855 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2016-4855 affect?

CVE-2016-4855 affects adodb. Severity is medium (CVSS 6.1). 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.

How urgent is CVE-2016-4855?

Priority 41/100. No elevated risk signals yet.

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References

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