CVE-2006-5021: Multiple PHP remote file inclusion vulnerabilities in redgun RedBLoG 0.5 allow remote attackers to execute arb

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2006-5021 is a critical-severity flaw (CVSS 9.8) affecting redblog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple PHP remote file inclusion vulnerabilities in redgun RedBLoG 0.5 allow remote attackers to execute arbitrary PHP code via a URL in (1) the root parameter in imgen.php, and the root_path parameter in (2) admin/config.php, (3) common.php, and (4) admin/index.php. NOTE: the provenance of this information is unknown; the details are obtained from third party information.

Why this priority

Critical severity
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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Weakness	CWE-94
Published	2006-09-27
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: redblog

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2006-09-27 23:07 UTCPublished CVE record published
2026-06-16 22:30 UTCUpdated Record last modified

redblog redblog DOWNGRADE

Affected: 0.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.5 (Debian / Ubuntu)

apt-cache madison redblog sudo apt install redblog=<VERSION_BEFORE_0.5> sudo apt-mark hold redblog

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

dnf --showduplicates list redblog sudo dnf downgrade redblog-<VERSION_BEFORE_0.5> sudo dnf versionlock add redblog

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: RedBLoG 0.5 - '/admin/config.php?root_path' Remote File Inclusion
Exploit-DB: RedBLoG 0.5 - '/admin/index.php?root_path' Remote File Inclusion
Exploit-DB: RedBLoG 0.5 - 'common.php?root_path' Remote File Inclusion
Exploit-DB: RedBLoG 0.5 - 'imgen.php?Root' Remote 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-2006-5021?

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

Is CVE-2006-5021 being exploited?

CVE-2006-5021 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-2006-5021 affect?

CVE-2006-5021 affects redblog. Severity is critical (CVSS 9.8). Multiple PHP remote file inclusion vulnerabilities in redgun RedBLoG 0.5 allow remote attackers to execute arbitrary PHP code via a URL in (1) the root parameter in imgen.php, and the root_path parameter in (2) admin/config.php, (3) common.

How urgent is CVE-2006-5021?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2006-4366 HIGH 7.5 DOWNGRADE PHP remote file inclusion vulnerability in index.php in RedBLoG 0.5 allows remote attackers to execute arbitra
CVE-2006-1140 HIGH 7.5 DOWNGRADE SQL injection vulnerability in rss.php in RedBLoG 0.5 allows remote attackers to execute arbitrary SQL command

References

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