CVE-2007-0538: Telligent Community Server 2.1 and earlier allows remote attackers to cause a denial of service (bandwidth or

Q: How do I fix CVE-2007-0538?

community server forums: upgrade to newer than 2.1. Exact commands for each OS are on this page.

Q: Is CVE-2007-0538 being exploited?

CVE-2007-0538 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2007-0538 affect?

CVE-2007-0538 affects community server forums. Severity is medium (CVSS 5.0). Telligent Community Server 2.1 and earlier allows remote attackers to cause a denial of service (bandwidth or thread consumption) via pingback service calls with a source URI that corresponds to (1) a large file, which triggers a long downl

Q: How urgent is CVE-2007-0538?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 5.0UPGRADE

CVE-2007-0538 is a medium-severity flaw (CVSS 5.0) affecting community server forums. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Telligent Community Server 2.1 and earlier allows remote attackers to cause a denial of service (bandwidth or thread consumption) via pingback service calls with a source URI that corresponds to (1) a large file, which triggers a long download session without a timeout constraint; or (2) a file with a binary content type, which is downloaded even though it cannot contain usable pingback data.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Published	2007-01-29
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: telligent systems

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

Am I affected?

Timeline

2007-01-29 17:28 UTCPublished CVE record published
2026-06-16 22:35 UTCUpdated Record last modified

telligent systems community server forums UPGRADE

Affected: <= 2.1

Fixed in: newer than 2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy community-server-forums || rpm -q community-server-forums || community-server-forums --version

2. UPGRADE to newer than 2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade community-server-forums

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade community-server-forums

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2007-0538?

community server forums: upgrade to newer than 2.1. Exact commands for each OS are on this page.

Is CVE-2007-0538 being exploited?

CVE-2007-0538 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-2007-0538 affect?

CVE-2007-0538 affects community server forums. Severity is medium (CVSS 5.0). Telligent Community Server 2.1 and earlier allows remote attackers to cause a denial of service (bandwidth or thread consumption) via pingback service calls with a source URI that corresponds to (1) a large file, which triggers a long downl

How urgent is CVE-2007-0538?

Priority 36/100. No elevated risk signals yet.

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References

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