CVE-2019-8331: In Bootstrap before 3.4.1 and 4.3.x before 4.3.1, XSS is possible in the tooltip or popover data-template attr

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MEDIUM 6.1UPGRADEUPGRADEUPGRADE

CVE-2019-8331 is a medium-severity flaw (CVSS 6.1) affecting bootstrap, big-ip access policy manager, big-ip advanced firewall manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Bootstrap before 3.4.1 and 4.3.x before 4.3.1, XSS is possible in the tooltip or popover data-template attribute.

Why this priority

EPSS top 3%: very likely to be exploited

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	16.4% (top 3%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-02-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: f5 · getbootstrap

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

Am I affected?

Timeline

2019-02-20 16:29 UTCPublished CVE record published
2026-06-17 02:41 UTCUpdated Record last modified

getbootstrap bootstrap UPGRADE

Affected: < 3.4.1 · >= 4.3.0 and < 4.3.1

Fixed in: 3.4.1, 4.3.1

Safe to downgrade to: a release before 4.3.0

1. Check installed version

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

2. UPGRADE to 3.4.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bootstrap

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 4.3.0 (Debian / Ubuntu)

apt-cache madison bootstrap sudo apt install bootstrap=<VERSION_BEFORE_4.3.0> sudo apt-mark hold bootstrap

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

dnf --showduplicates list bootstrap sudo dnf downgrade bootstrap-<VERSION_BEFORE_4.3.0> sudo dnf versionlock add bootstrap

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.

f5 big-ip access policy manager UPGRADE

Affected: >= 12.1.0 and < 12.1.5.1 · >= 13.0.0 and < 13.1.3.4 · >= 14.0.0 and < 14.1.2.5 · >= 15.0.0 and < 15.1.0

Fixed in: 12.1.5.1, 13.1.3.4, 14.1.2.5, 15.1.0

Safe to downgrade to: a release before 12.1.0

1. Check installed version

apt-cache policy big-ip-access-policy-manager || rpm -q big-ip-access-policy-manager || big-ip-access-policy-manager --version

2. UPGRADE to 12.1.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade big-ip-access-policy-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade big-ip-access-policy-manager

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 12.1.0 (Debian / Ubuntu)

apt-cache madison big-ip-access-policy-manager sudo apt install big-ip-access-policy-manager=<VERSION_BEFORE_12.1.0> sudo apt-mark hold big-ip-access-policy-manager

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

dnf --showduplicates list big-ip-access-policy-manager sudo dnf downgrade big-ip-access-policy-manager-<VERSION_BEFORE_12.1.0> sudo dnf versionlock add big-ip-access-policy-manager

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.

f5 big-ip advanced firewall manager UPGRADE

Affected: >= 12.1.0 and < 12.1.5.1 · >= 13.0.0 and < 13.1.3.4 · >= 14.0.0 and < 14.1.2.5 · >= 15.0.0 and < 15.1.0

Fixed in: 12.1.5.1, 13.1.3.4, 14.1.2.5, 15.1.0

Safe to downgrade to: a release before 12.1.0

1. Check installed version

apt-cache policy big-ip-advanced-firewall-manager || rpm -q big-ip-advanced-firewall-manager || big-ip-advanced-firewall-manager --version

2. UPGRADE to 12.1.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade big-ip-advanced-firewall-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade big-ip-advanced-firewall-manager

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 12.1.0 (Debian / Ubuntu)

apt-cache madison big-ip-advanced-firewall-manager sudo apt install big-ip-advanced-firewall-manager=<VERSION_BEFORE_12.1.0> sudo apt-mark hold big-ip-advanced-firewall-manager

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

dnf --showduplicates list big-ip-advanced-firewall-manager sudo dnf downgrade big-ip-advanced-firewall-manager-<VERSION_BEFORE_12.1.0> sudo dnf versionlock add big-ip-advanced-firewall-manager

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.

f5 big-ip analytics UPGRADE

Affected: >= 12.1.0 and < 12.1.5.1 · >= 13.0.0 and < 13.1.3.4 · >= 14.0.0 and < 14.1.2.5 · >= 15.0.0 and < 15.1.0

Fixed in: 12.1.5.1, 13.1.3.4, 14.1.2.5, 15.1.0

Safe to downgrade to: a release before 12.1.0

1. Check installed version

apt-cache policy big-ip-analytics || rpm -q big-ip-analytics || big-ip-analytics --version

2. UPGRADE to 12.1.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade big-ip-analytics

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade big-ip-analytics

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 12.1.0 (Debian / Ubuntu)

apt-cache madison big-ip-analytics sudo apt install big-ip-analytics=<VERSION_BEFORE_12.1.0> sudo apt-mark hold big-ip-analytics

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

dnf --showduplicates list big-ip-analytics sudo dnf downgrade big-ip-analytics-<VERSION_BEFORE_12.1.0> sudo dnf versionlock add big-ip-analytics

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.

f5 big-ip application acceleration manager UPGRADE

Affected: >= 12.1.0 and < 12.1.5.1 · >= 13.0.0 and < 13.1.3.4 · >= 14.0.0 and < 14.1.2.5 · >= 15.0.0 and < 15.1.0

Fixed in: 12.1.5.1, 13.1.3.4, 14.1.2.5, 15.1.0

Safe to downgrade to: a release before 12.1.0

1. Check installed version

apt-cache policy big-ip-application-acceleration-manager || rpm -q big-ip-application-acceleration-manager || big-ip-application-acceleration-manager --version

2. UPGRADE to 12.1.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade big-ip-application-acceleration-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade big-ip-application-acceleration-manager

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 12.1.0 (Debian / Ubuntu)

apt-cache madison big-ip-application-acceleration-manager sudo apt install big-ip-application-acceleration-manager=<VERSION_BEFORE_12.1.0> sudo apt-mark hold big-ip-application-acceleration-manager

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

dnf --showduplicates list big-ip-application-acceleration-manager sudo dnf downgrade big-ip-application-acceleration-manager-<VERSION_BEFORE_12.1.0> sudo dnf versionlock add big-ip-application-acceleration-manager

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.

f5 big-ip application security manager UPGRADE

Affected: >= 12.1.0 and < 12.1.5.1 · >= 13.0.0 and < 13.1.3.4 · >= 14.0.0 and < 14.1.2.5 · >= 15.0.0 and < 15.1.0

Fixed in: 12.1.5.1, 13.1.3.4, 14.1.2.5, 15.1.0

Safe to downgrade to: a release before 12.1.0

1. Check installed version

apt-cache policy big-ip-application-security-manager || rpm -q big-ip-application-security-manager || big-ip-application-security-manager --version

2. UPGRADE to 12.1.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade big-ip-application-security-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade big-ip-application-security-manager

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 12.1.0 (Debian / Ubuntu)

apt-cache madison big-ip-application-security-manager sudo apt install big-ip-application-security-manager=<VERSION_BEFORE_12.1.0> sudo apt-mark hold big-ip-application-security-manager

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

dnf --showduplicates list big-ip-application-security-manager sudo dnf downgrade big-ip-application-security-manager-<VERSION_BEFORE_12.1.0> sudo dnf versionlock add big-ip-application-security-manager

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-2019-8331?

bootstrap: upgrade to 3.4.1, 4.3.1; big-ip access policy manager: upgrade to 12.1.5.1, 13.1.3.4, 14.1.2.5, 15.1.0; big-ip advanced firewall manager: upgrade to 12.1.5.1, 13.1.3.4, 14.1.2.5, 15.1.0. Exact commands for each OS are on this page.

Is CVE-2019-8331 being exploited?

CVE-2019-8331 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-2019-8331 affect?

CVE-2019-8331 affects bootstrap, big-ip access policy manager, big-ip advanced firewall manager. Severity is medium (CVSS 6.1). In Bootstrap before 3.4.1 and 4.3.x before 4.3.1, XSS is possible in the tooltip or popover data-template attribute.

How urgent is CVE-2019-8331?

Priority 46/100. EPSS top 3%: very likely to be exploited

Software pages

F5 BIG-IP vulnerabilities · Bootstrap vulnerabilities

Related CVEs

CVE-2018-20677 MEDIUM 6.1 UPGRADE In Bootstrap before 3.4.0, XSS is possible in the affix configuration target property.
CVE-2018-20676 MEDIUM 6.1 UPGRADE In Bootstrap before 3.4.0, XSS is possible in the tooltip data-viewport attribute.
CVE-2018-14042 MEDIUM 6.1 UPGRADE In Bootstrap before 4.1.2, XSS is possible in the data-container property of tooltip.
CVE-2018-14041 MEDIUM 6.1 UPGRADE In Bootstrap before 4.1.2, XSS is possible in the data-target property of scrollspy.
CVE-2018-14040 MEDIUM 6.1 MITIGATE UPGRADE In Bootstrap before 4.1.2, XSS is possible in the collapse data-parent attribute.

References

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