CVE-2006-3750: PHP remote file inclusion vulnerability in server.php in the Hashcash Component (com_hashcash) 1.2.1 for Jooml

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MEDIUM 6.8DOWNGRADE

CVE-2006-3750 is a medium-severity flaw (CVSS 6.8) affecting hashcash. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PHP remote file inclusion vulnerability in server.php in the Hashcash Component (com_hashcash) 1.2.1 for Joomla! allows remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter.

Why this priority

EPSS top 7%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	5.8% (top 7%)
CISA exploited list	No
Weakness	CWE-94
Published	2006-07-21
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: hashcash

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

Am I affected?

Timeline

2006-07-21 14:03 UTCPublished CVE record published
2026-06-16 22:27 UTCUpdated Record last modified

hashcash hashcash DOWNGRADE

Affected: 1.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2.1 (Debian / Ubuntu)

apt-cache madison hashcash sudo apt install hashcash=<VERSION_BEFORE_1.2.1> sudo apt-mark hold hashcash

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

dnf --showduplicates list hashcash sudo dnf downgrade hashcash-<VERSION_BEFORE_1.2.1> sudo dnf versionlock add hashcash

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: Mambo Component com_hashcash 1.2.1 - 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-2006-3750?

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

Is CVE-2006-3750 being exploited?

CVE-2006-3750 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-2006-3750 affect?

CVE-2006-3750 affects hashcash. Severity is medium (CVSS 6.8). PHP remote file inclusion vulnerability in server.php in the Hashcash Component (com_hashcash) 1.2.1 for Joomla! allows remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter.

How urgent is CVE-2006-3750?

Priority 52/100. EPSS top 7%: very likely to be exploited; Public exploit reference

Software pages

Joomla vulnerabilities · PHP vulnerabilities

Related CVEs

CVE-2012-4469 LOW 2.6 DOWNGRADE Cross-site scripting (XSS) vulnerability in the Hashcash module 6.x-2.x before 6.x-2.6 and 7.x-2.x before 7.x-
CVE-2006-3251 HIGH 7.5 UPGRADE Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attac
CVE-2005-0687 HIGH 7.5 DOWNGRADE Format string vulnerability in Hashcash 1.16 allows remote attackers to cause a denial of service (memory cons

References

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