CVE-2015-6512: SQL injection vulnerability in the get_messages function in server/plugins/chatroom/chatroom.php in FreiChat 9

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MEDIUM 5.0DOWNGRADE

CVE-2015-6512 is a medium-severity flaw (CVSS 5.0) affecting freichat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL injection vulnerability in the get_messages function in server/plugins/chatroom/chatroom.php in FreiChat 9.6 allows remote attackers to execute arbitrary SQL commands via the time parameter to server/freichat.php.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-89
Published	2015-08-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: codelogic

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-08-18 15:59 UTCPublished CVE record published
2026-06-17 00:30 UTCUpdated Record last modified

codelogic freichat DOWNGRADE

Affected: 9.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 9.6 (Debian / Ubuntu)

apt-cache madison freichat sudo apt install freichat=<VERSION_BEFORE_9.6> sudo apt-mark hold freichat

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

dnf --showduplicates list freichat sudo dnf downgrade freichat-<VERSION_BEFORE_9.6> sudo dnf versionlock add freichat

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: FreiChat 9.6 - SQL Injection

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-2015-6512?

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

Is CVE-2015-6512 being exploited?

CVE-2015-6512 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-2015-6512 affect?

CVE-2015-6512 affects freichat. Severity is medium (CVSS 5.0). SQL injection vulnerability in the get_messages function in server/plugins/chatroom/chatroom.php in FreiChat 9.6 allows remote attackers to execute arbitrary SQL commands via the time parameter to server/freichat.php.

How urgent is CVE-2015-6512?

Priority 44/100. Public exploit reference

Software pages

PHP vulnerabilities

References

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