CVE-2007-0763: Cross-site scripting (XSS) vulnerability in the news comment functionality in F3Site 2.1 and earlier allows re

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MEDIUM 6.8DOWNGRADE

CVE-2007-0763 is a medium-severity flaw (CVSS 6.8) affecting f3site. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in the news comment functionality in F3Site 2.1 and earlier allows remote attackers to inject arbitrary web script or HTML via the Autor field.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Published	2007-02-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: f3site

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

Am I affected?

Timeline

2007-02-06 02:28 UTCPublished CVE record published
2026-06-16 22:36 UTCUpdated Record last modified

f3site f3site DOWNGRADE

Affected: 2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1

1. Check installed version

apt-cache policy f3site || rpm -q f3site || f3site --version

2. No fixed release: DOWNGRADE to a release before 2.1 (Debian / Ubuntu)

apt-cache madison f3site sudo apt install f3site=<VERSION_BEFORE_2.1> sudo apt-mark hold f3site

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

dnf --showduplicates list f3site sudo dnf downgrade f3site-<VERSION_BEFORE_2.1> sudo dnf versionlock add f3site

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: F3Site 2.1 - Remote Code Execution

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-2007-0763?

f3site: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-0763 being exploited?

CVE-2007-0763 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-2007-0763 affect?

CVE-2007-0763 affects f3site. Severity is medium (CVSS 6.8). Cross-site scripting (XSS) vulnerability in the news comment functionality in F3Site 2.1 and earlier allows remote attackers to inject arbitrary web script or HTML via the Autor field.

How urgent is CVE-2007-0763?

Priority 48/100. Public exploit reference

Related CVEs

CVE-2009-4435 MEDIUM 6.8 DOWNGRADE Multiple directory traversal vulnerabilities in F3Site 2009 allow remote attackers to include and execute arbi
CVE-2007-0764 MEDIUM 6.5 DOWNGRADE Unrestricted file upload vulnerability in F3Site 2.1 and earlier allows remote authenticated administrators to

References

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