CVE-2018-16133: Cybrotech CyBroHttpServer 1.0.3 allows Directory Traversal via a ../ in the URI.

This week

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2018-16133 is a medium-severity flaw (CVSS 5.3) affecting cybrohttpserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cybrotech CyBroHttpServer 1.0.3 allows Directory Traversal via a ../ in the URI.

Why this priority

EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	39.3% (top 1%)
CISA exploited list	No
Weakness	CWE-22
Published	2018-08-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cybrotech

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

Am I affected?

Timeline

2018-08-29 22:29 UTCPublished CVE record published
2026-06-17 01:43 UTCUpdated Record last modified

cybrotech cybrohttpserver DOWNGRADE

Affected: 1.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.3 (Debian / Ubuntu)

apt-cache madison cybrohttpserver sudo apt install cybrohttpserver=<VERSION_BEFORE_1.0.3> sudo apt-mark hold cybrohttpserver

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cybrohttpserver sudo dnf downgrade cybrohttpserver-<VERSION_BEFORE_1.0.3> sudo dnf versionlock add cybrohttpserver

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Cybrotech CyBroHttpServer 1.0.3 - Directory Traversal
Nuclei scan template: Cybrotech CyBroHttpServer 1.0.3 - Local File Inclusion

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-2018-16133?

cybrohttpserver: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-16133 being exploited?

CVE-2018-16133 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-2018-16133 affect?

CVE-2018-16133 affects cybrohttpserver. Severity is medium (CVSS 5.3). Cybrotech CyBroHttpServer 1.0.3 allows Directory Traversal via a ../ in the URI.

How urgent is CVE-2018-16133?

Priority 53/100. EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2018-16134 MEDIUM 6.1 DOWNGRADE Cybrotech CyBroHttpServer 1.0.3 allows XSS via a URI.

References

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