CVE-2006-0865: PunBB 1.2.10 and earlier allows remote attackers to cause a denial of service (resource consumption) by regist

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MEDIUM 5.0DOWNGRADE

CVE-2006-0865 is a medium-severity flaw (CVSS 5.0) affecting punbb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PunBB 1.2.10 and earlier allows remote attackers to cause a denial of service (resource consumption) by registering many user accounts quickly.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Published	2006-02-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: punbb

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

Am I affected?

Timeline

2006-02-23 23:02 UTCPublished CVE record published
2026-06-16 22:21 UTCUpdated Record last modified

punbb punbb DOWNGRADE

Affected: 1.0 · 1.0.1 · 1.0_alpha · 1.0_beta1 · 1.0_beta1a · 1.0_beta2 · 1.0_beta3 · 1.0_rc1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison punbb sudo apt install punbb=<VERSION_BEFORE_1.0> sudo apt-mark hold punbb

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

dnf --showduplicates list punbb sudo dnf downgrade punbb-<VERSION_BEFORE_1.0> sudo dnf versionlock add punbb

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: PunBB 2.0.10 - Register Multiple Users Denial of Service

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-2006-0865?

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

Is CVE-2006-0865 being exploited?

CVE-2006-0865 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-2006-0865 affect?

CVE-2006-0865 affects punbb. Severity is medium (CVSS 5.0). PunBB 1.2.10 and earlier allows remote attackers to cause a denial of service (resource consumption) by registering many user accounts quickly.

How urgent is CVE-2006-0865?

Priority 44/100. Public exploit reference

Related CVEs

CVE-2021-28968 MEDIUM 5.4 UPGRADE An issue was discovered in PunBB before 1.4.6
CVE-2011-3371 MEDIUM 4.3 UPGRADE Multiple cross-site scripting (XSS) vulnerabilities in include/functions.php in PunBB before 1.3.6 allow remot
CVE-2010-0455 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in forum/viewtopic.php in PunBB 1.3 allows remote attackers to inject
CVE-2009-4894 MEDIUM 4.3 UPGRADE Multiple cross-site scripting (XSS) vulnerabilities in profile.php in PunBB before 1.3.4 allow remote attacker
CVE-2008-7241 MEDIUM 6.8 UPGRADE Cross-site request forgery (CSRF) vulnerability in PunBB before 1.2.17 allows remote attackers to hijack the a

References

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