CVE-2007-1623: Multiple cross-site scripting (XSS) vulnerabilities in realGuestbook 5.01, when register_globals is enabled, a

Routine

MEDIUM 4.3DOWNGRADE

CVE-2007-1623 is a medium-severity flaw (CVSS 4.3) affecting realguestbook. 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 realGuestbook 5.01, when register_globals is enabled, allow remote attackers to inject arbitrary web script or HTML via the (1) bg_color_1, (2) fs_menu, (3) fc_menu, (4) ff_menu, (5) bg_color_2, (6) fs_normal, (7) fc_normal, and (8) ff_normal parameters to welcome_admin.php; and possibly unspecified other parameters and files. NOTE: the provenance of this information is unknown; the details

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Published	2007-03-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: realguestbook

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

Am I affected?

Timeline

2007-03-23 21:19 UTCPublished CVE record published
2026-06-16 22:37 UTCUpdated Record last modified

realguestbook realguestbook DOWNGRADE

Affected: 5.01

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.01

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.01 (Debian / Ubuntu)

apt-cache madison realguestbook sudo apt install realguestbook=<VERSION_BEFORE_5.01> sudo apt-mark hold realguestbook

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

dnf --showduplicates list realguestbook sudo dnf downgrade realguestbook-<VERSION_BEFORE_5.01> sudo dnf versionlock add realguestbook

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-2007-1623?

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

Is CVE-2007-1623 being exploited?

CVE-2007-1623 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-2007-1623 affect?

CVE-2007-1623 affects realguestbook. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in realGuestbook 5.01, when register_globals is enabled, allow remote attackers to inject arbitrary web script or HTML via the (1) bg_color_1, (2) fs_menu, (3) fc_menu, (4) ff_menu, (5) bg

How urgent is CVE-2007-1623?

Priority 30/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2007-1625 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in save_entry.php in realGuestbook 5.01 allows remote attackers to in
CVE-2007-1624 HIGH 7.5 DOWNGRADE Multiple SQL injection vulnerabilities in realGuestbook 5.01 allow remote attackers to execute arbitrary SQL c

References

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