CVE-2014-10399: The session.lua library in CGILua 5.1.x uses the same ID for each session, which allows remote attackers to hi

Routine

MEDIUM 6.1UPGRADE

CVE-2014-10399 is a medium-severity flaw (CVSS 6.1) affecting cgilua. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The session.lua library in CGILua 5.1.x uses the same ID for each session, which allows remote attackers to hijack arbitrary sessions. NOTE: this vulnerability was SPLIT from CVE-2014-2875.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-384
Published	2020-02-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: keplerproject

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

Am I affected?

Timeline

2020-02-06 16:15 UTCPublished CVE record published
2026-06-17 00:04 UTCUpdated Record last modified

keplerproject cgilua UPGRADE

Affected: >= 5.0.0 and <= 5.0.1 · >= 5.1.0 and <= 5.1.4 · 5.2 alpha1 · 5.2 alpha2

Fixed in: newer than 5.1.4

Safe to downgrade to: a release before 5.0.0

1. Check installed version

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

2. UPGRADE to newer than 5.1.4 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cgilua

Note

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

3. If no update is available yet, DOWNGRADE to a release before 5.0.0 (Debian / Ubuntu)

apt-cache madison cgilua sudo apt install cgilua=<VERSION_BEFORE_5.0.0> sudo apt-mark hold cgilua

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cgilua sudo dnf downgrade cgilua-<VERSION_BEFORE_5.0.0> sudo dnf versionlock add cgilua

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.

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-2014-10399?

cgilua: upgrade to newer than 5.1.4. Exact commands for each OS are on this page.

Is CVE-2014-10399 being exploited?

CVE-2014-10399 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-2014-10399 affect?

CVE-2014-10399 affects cgilua. Severity is medium (CVSS 6.1). The session.lua library in CGILua 5.1.x uses the same ID for each session, which allows remote attackers to hijack arbitrary sessions. NOTE: this vulnerability was SPLIT from CVE-2014-2875.

How urgent is CVE-2014-10399?

Priority 39/100. No elevated risk signals yet.

Related CVEs

CVE-2014-2875 MEDIUM 6.1 UPGRADE The session.lua library in CGILua 5.2 alpha 1 and 5.2 alpha 2 uses weak session IDs generated based on OS time
CVE-2014-10400 MEDIUM 6.1 UPGRADE The session.lua library in CGILua 5.0.x uses sequential session IDs, which makes it easier for remote attacker

References

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