CVE-2011-5195: Cross-site request forgery (CSRF) vulnerability in index/manager/fileUpload in Public Knowledge Project Open C

Q: How do I fix CVE-2011-5195?

open conference systems: upgrade to newer than 2.3.4. Exact commands for each OS are on this page.

Q: Is CVE-2011-5195 being exploited?

CVE-2011-5195 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-2011-5195 affect?

CVE-2011-5195 affects open conference systems. Severity is medium (CVSS 6.8). Cross-site request forgery (CSRF) vulnerability in index/manager/fileUpload in Public Knowledge Project Open Conference Systems 2.3.4 and earlier allows remote attackers to hijack the authentication of administrators for requests that uploa

Q: How urgent is CVE-2011-5195?

Priority 45/100. Public exploit reference

This month

MEDIUM 6.8UPGRADE

CVE-2011-5195 is a medium-severity flaw (CVSS 6.8) affecting open conference systems. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site request forgery (CSRF) vulnerability in index/manager/fileUpload in Public Knowledge Project Open Conference Systems 2.3.4 and earlier allows remote attackers to hijack the authentication of administrators for requests that upload a PHP file.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-352
Published	2012-09-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: public knowledge project

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

Am I affected?

Timeline

2012-09-23 17:55 UTCPublished CVE record published
2026-06-16 23:36 UTCUpdated Record last modified

public knowledge project open conference systems UPGRADE

Affected: <= 2.3.4 · 1.0 · 1.1 · 1.1.1 · 1.1.2 · 1.1.3 · 1.1.4 · 1.1.5

Fixed in: newer than 2.3.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy open-conference-systems || rpm -q open-conference-systems || open-conference-systems --version

2. UPGRADE to newer than 2.3.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade open-conference-systems

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade open-conference-systems

Note

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

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: Open Conference/Journal/Harvester Systems 2.3.x - Multiple Remote Code Execution Vulnerabilities

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-2011-5195?

open conference systems: upgrade to newer than 2.3.4. Exact commands for each OS are on this page.

Is CVE-2011-5195 being exploited?

CVE-2011-5195 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-2011-5195 affect?

CVE-2011-5195 affects open conference systems. Severity is medium (CVSS 6.8). Cross-site request forgery (CSRF) vulnerability in index/manager/fileUpload in Public Knowledge Project Open Conference Systems 2.3.4 and earlier allows remote attackers to hijack the authentication of administrators for requests that uploa

How urgent is CVE-2011-5195?

Priority 45/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2006-5308 HIGH 7.5 UPGRADE Multiple PHP remote file inclusion vulnerabilities in Open Conference Systems (OCS) before 1.1.6 allow remote

References

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