CVE-2014-2875: The session.lua library in CGILua 5.2 alpha 1 and 5.2 alpha 2 uses weak session IDs generated based on OS time

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MEDIUM 6.1UPGRADE

CVE-2014-2875 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 5.2 alpha 1 and 5.2 alpha 2 uses weak session IDs generated based on OS time, which allows remote attackers to hijack arbitrary sessions via a brute force attack. NOTE: CVE-2014-10399 and CVE-2014-10400 were SPLIT from this ID.

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	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-307
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 00:07 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-2014-2875?

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

Is CVE-2014-2875 being exploited?

CVE-2014-2875 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-2014-2875 affect?

CVE-2014-2875 affects cgilua. Severity is medium (CVSS 6.1). The session.lua library in CGILua 5.2 alpha 1 and 5.2 alpha 2 uses weak session IDs generated based on OS time, which allows remote attackers to hijack arbitrary sessions via a brute force attack. NOTE: CVE-2014-10399 and CVE-2014-10400 wer

How urgent is CVE-2014-2875?

Priority 40/100. No elevated risk signals yet.

Related CVEs

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
CVE-2014-10399 MEDIUM 6.1 UPGRADE The session.lua library in CGILua 5.1.x uses the same ID for each session, which allows remote attackers to hi

References

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