CVE-2013-6839: SQL injection vulnerability in InstantSoft InstantCMS 1.10.3 and earlier allows remote attackers to execute ar

Q: How do I fix CVE-2013-6839?

instantcms: upgrade to newer than 1.10.3. Exact commands for each OS are on this page.

Q: Is CVE-2013-6839 being exploited?

CVE-2013-6839 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-2013-6839 affect?

CVE-2013-6839 affects instantcms. Severity is high (CVSS 7.5). SQL injection vulnerability in InstantSoft InstantCMS 1.10.3 and earlier allows remote attackers to execute arbitrary SQL commands via the orderby parameter to catalog/[id].

Q: How urgent is CVE-2013-6839?

Priority 48/100. High severity; Public exploit reference

This month

HIGH 7.5UPGRADE

CVE-2013-6839 is a high-severity flaw (CVSS 7.5) affecting instantcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL injection vulnerability in InstantSoft InstantCMS 1.10.3 and earlier allows remote attackers to execute arbitrary SQL commands via the orderby parameter to catalog/[id].

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-89
Published	2013-12-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: instantsoft

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

Am I affected?

Timeline

2013-12-13 18:07 UTCPublished CVE record published
2026-06-17 00:01 UTCUpdated Record last modified

instantsoft instantcms UPGRADE

Affected: <= 1.10.3

Fixed in: newer than 1.10.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.10.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade instantcms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade instantcms

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: InstantCMS 1.10.3 - Blind 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-2013-6839?

instantcms: upgrade to newer than 1.10.3. Exact commands for each OS are on this page.

Is CVE-2013-6839 being exploited?

CVE-2013-6839 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-2013-6839 affect?

CVE-2013-6839 affects instantcms. Severity is high (CVSS 7.5). SQL injection vulnerability in InstantSoft InstantCMS 1.10.3 and earlier allows remote attackers to execute arbitrary SQL commands via the orderby parameter to catalog/[id].

How urgent is CVE-2013-6839?

Priority 48/100. High severity; Public exploit reference

Related CVEs

CVE-2026-28281 HIGH 7.1 UPGRADE InstantCMS is a free and open source content management system
CVE-2025-59055 MEDIUM 4.7 UPGRADE InstantCMS is a free and open source content management system
CVE-2024-50348 MEDIUM 5.4 UPGRADE InstantCMS is a free and open source content management system
CVE-2024-31212 MEDIUM 6.7 DOWNGRADE InstantCMS is a free and open source content management system
CVE-2023-4879 MEDIUM 4.8 UPGRADE Cross-site Scripting (XSS) - Stored in GitHub repository instantsoft/icms2 prior to 2.16.1.-git.

References

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