CVE-2005-4642: Multiple cross-site scripting (XSS) vulnerabilities in HydroBB 1.0.0 Beta 2 allow remote attackers to inject a

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MEDIUM 4.3DOWNGRADE

CVE-2005-4642 is a medium-severity flaw (CVSS 4.3) affecting hydrobb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in HydroBB 1.0.0 Beta 2 allow remote attackers to inject arbitrary web script or HTML via the s parameter to (1) search.php, (2) members.php, (3) stats.php, (4) viewforum.php, (5) register.php, (6) usercp.php, (7) groups.php, (8) pms.php, and (9) calendar.php.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Published	2005-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: hydrobb

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

Am I affected?

Timeline

2005-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:19 UTCUpdated Record last modified

hydrobb hydrobb DOWNGRADE

Affected: 1.0.0_beta_2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0_beta_2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.0_beta_2 (Debian / Ubuntu)

apt-cache madison hydrobb sudo apt install hydrobb=<VERSION_BEFORE_1.0.0_beta_2> sudo apt-mark hold hydrobb

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

dnf --showduplicates list hydrobb sudo dnf downgrade hydrobb-<VERSION_BEFORE_1.0.0_beta_2> sudo dnf versionlock add hydrobb

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.

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-2005-4642?

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

Is CVE-2005-4642 being exploited?

CVE-2005-4642 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-2005-4642 affect?

CVE-2005-4642 affects hydrobb. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in HydroBB 1.0.0 Beta 2 allow remote attackers to inject arbitrary web script or HTML via the s parameter to (1) search.php, (2) members.php, (3) stats.php, (4) viewforum.php, (5) register

How urgent is CVE-2005-4642?

Priority 40/100. Public exploit reference

Software pages

PHP vulnerabilities

References

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