CVE-2012-10034: ClanSphere 2011.3 is vulnerable to a local file inclusion (LFI) flaw due to improper handling of the cs_lang c

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2012-10034 is a high-severity flaw (CVSS 7.5) affecting clansphere. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ClanSphere 2011.3 is vulnerable to a local file inclusion (LFI) flaw due to improper handling of the cs_lang cookie parameter. The application fails to sanitize user-supplied input, allowing attackers to traverse directories and read arbitrary files outside the web root. The vulnerability is further exacerbated by null byte injection (%00) to bypass file extension checks.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-22
Published	2025-08-05
Last modified	2026-06-16

Publisher (CNA): VulnCheck · Vendor: csphere

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

Am I affected?

Timeline

2025-08-05 20:15 UTCPublished CVE record published
2026-06-16 23:38 UTCUpdated Record last modified

csphere clansphere DOWNGRADE

Affected: 2011.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2011.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2011.3 (Debian / Ubuntu)

apt-cache madison clansphere sudo apt install clansphere=<VERSION_BEFORE_2011.3> sudo apt-mark hold clansphere

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

dnf --showduplicates list clansphere sudo dnf downgrade clansphere-<VERSION_BEFORE_2011.3> sudo dnf versionlock add clansphere

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.

Metasploit: ClanSphere 2011.3 Local File Inclusion Vulnerability

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-2012-10034?

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

Is CVE-2012-10034 being exploited?

CVE-2012-10034 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-2012-10034 affect?

CVE-2012-10034 affects clansphere. Severity is high (CVSS 7.5). ClanSphere 2011.3 is vulnerable to a local file inclusion (LFI) flaw due to improper handling of the cs_lang cookie parameter. The application fails to sanitize user-supplied input, allowing attackers to traverse directories and read arbitr

How urgent is CVE-2012-10034?

Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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