CVE-2018-8056: Physical path Leakage exists in Western Bridge Cobub Razor 0.8.0 via an invalid channel_name parameter to /ind

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HIGH 7.5REMOTEDOWNGRADE

CVE-2018-8056 is a high-severity flaw (CVSS 7.5) affecting razor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Physical path Leakage exists in Western Bridge Cobub Razor 0.8.0 via an invalid channel_name parameter to /index.php?/manage/channel/addchannel or a direct request to /export.php.

Why this priority

High severity
EPSS top 4%: 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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	12.7% (top 4%)
CISA exploited list	No
Weakness	CWE-200
Published	2018-03-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cobub

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

Am I affected?

Timeline

2018-03-11 18:29 UTCPublished CVE record published
2026-06-17 02:04 UTCUpdated Record last modified

cobub razor DOWNGRADE

Affected: 0.8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.8.0 (Debian / Ubuntu)

apt-cache madison razor sudo apt install razor=<VERSION_BEFORE_0.8.0> sudo apt-mark hold razor

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

dnf --showduplicates list razor sudo dnf downgrade razor-<VERSION_BEFORE_0.8.0> sudo dnf versionlock add razor

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: Cobub Razor 0.8.0 - Physical Path Leakage

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-2018-8056?

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

Is CVE-2018-8056 being exploited?

CVE-2018-8056 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-2018-8056 affect?

CVE-2018-8056 affects razor. Severity is high (CVSS 7.5). Physical path Leakage exists in Western Bridge Cobub Razor 0.8.0 via an invalid channel_name parameter to /index.php?/manage/channel/addchannel or a direct request to /export.php.

How urgent is CVE-2018-8056?

Priority 60/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

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CVE-2019-10276 CRITICAL 9.8 DOWNGRADE Western Bridge Cobub Razor 0.8.0 has a file upload vulnerability via the web/assets/swf/uploadify.php URI, as
CVE-2018-8770 MEDIUM 5.3 DOWNGRADE Physical path Leakage exists in Western Bridge Cobub Razor 0.8.0 via generate.php, controllers/getConfigTest.p
CVE-2018-8057 CRITICAL 9.8 DOWNGRADE A SQL Injection vulnerability exists in Western Bridge Cobub Razor 0.8.0 via the channel_name or platform para

References

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