CVE-2018-12580: library/DBTech/Security/Action/Sessions.php in DragonByte vBSecurity 3.x through 3.3.0 for vBulletin 3 and vBu

Routine

MEDIUM 6.1UPGRADEUPGRADE

CVE-2018-12580 is a medium-severity flaw (CVSS 6.1) affecting vbsecurity, vbsecurity. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

library/DBTech/Security/Action/Sessions.php in DragonByte vBSecurity 3.x through 3.3.0 for vBulletin 3 and vBulletin 4 allows self-XSS via $session['user_agent'] in the "Login Sessions" feature.

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	0.6% (top 49%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-06-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dragonbyte-tech

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

Am I affected?

Timeline

2018-06-19 16:29 UTCPublished CVE record published
2026-06-17 01:38 UTCUpdated Record last modified

dragonbyte-tech vbsecurity UPGRADE

Affected: >= 3.0.0 and <= 3.3.0

Fixed in: newer than 3.3.0

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. UPGRADE to newer than 3.3.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vbsecurity

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 3.0.0 (Debian / Ubuntu)

apt-cache madison vbsecurity sudo apt install vbsecurity=<VERSION_BEFORE_3.0.0> sudo apt-mark hold vbsecurity

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

dnf --showduplicates list vbsecurity sudo dnf downgrade vbsecurity-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add vbsecurity

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.

dragonbyte-tech vbsecurity UPGRADE

Affected: >= 3.0.0 and <= 3.3.0

Fixed in: newer than 3.3.0

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. UPGRADE to newer than 3.3.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vbsecurity

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 3.0.0 (Debian / Ubuntu)

apt-cache madison vbsecurity sudo apt install vbsecurity=<VERSION_BEFORE_3.0.0> sudo apt-mark hold vbsecurity

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

dnf --showduplicates list vbsecurity sudo dnf downgrade vbsecurity-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add vbsecurity

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-2018-12580?

vbsecurity: upgrade to newer than 3.3.0; vbsecurity: upgrade to newer than 3.3.0. Exact commands for each OS are on this page.

Is CVE-2018-12580 being exploited?

CVE-2018-12580 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-2018-12580 affect?

CVE-2018-12580 affects vbsecurity, vbsecurity. Severity is medium (CVSS 6.1). library/DBTech/Security/Action/Sessions.php in DragonByte vBSecurity 3.x through 3.3.0 for vBulletin 3 and vBulletin 4 allows self-XSS via $session['user_agent'] in the "Login Sessions" feature.

How urgent is CVE-2018-12580?

Priority 34/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

References

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