CVE-2019-16531: LayerBB before 1.1.4 has multiple CSRF issues, as demonstrated by changing the System Settings via admin/gener

Q: How do I fix CVE-2019-16531?

layerbb: upgrade to 1.1.4. Exact commands for each OS are on this page.

Q: Is CVE-2019-16531 being exploited?

CVE-2019-16531 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-2019-16531 affect?

CVE-2019-16531 affects layerbb. Severity is high (CVSS 8.8). LayerBB before 1.1.4 has multiple CSRF issues, as demonstrated by changing the System Settings via admin/general.php.

Q: How urgent is CVE-2019-16531?

Priority 57/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2019-16531 is a high-severity flaw (CVSS 8.8) affecting layerbb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LayerBB before 1.1.4 has multiple CSRF issues, as demonstrated by changing the System Settings via admin/general.php.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-352
Published	2019-09-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: layerbb

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

Am I affected?

Timeline

2019-09-20 02:16 UTCPublished CVE record published
2026-06-17 02:22 UTCUpdated Record last modified

layerbb layerbb UPGRADE

Affected: < 1.1.4

Fixed in: 1.1.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.1.4 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade layerbb

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: LayerBB < 1.1.4 - Cross-Site Request Forgery

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-2019-16531?

layerbb: upgrade to 1.1.4. Exact commands for each OS are on this page.

Is CVE-2019-16531 being exploited?

CVE-2019-16531 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-2019-16531 affect?

CVE-2019-16531 affects layerbb. Severity is high (CVSS 8.8). LayerBB before 1.1.4 has multiple CSRF issues, as demonstrated by changing the System Settings via admin/general.php.

How urgent is CVE-2019-16531?

Priority 57/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2019-13974 HIGH 8.8 DOWNGRADE LayerBB 1.1.3 allows conversations.php/cmd/new CSRF.
CVE-2019-13973 CRITICAL 9.8 DOWNGRADE LayerBB 1.1.3 allows admin/general.php arbitrary file upload because the custom_logo filename suffix is not re
CVE-2019-13972 MEDIUM 6.1 DOWNGRADE LayerBB 1.1.3 allows XSS via the application/commands/new.php pm_title variable, a related issue to CVE-2019-1
CVE-2018-17997 MEDIUM 6.1 DOWNGRADE LayerBB 1.1.1 allows XSS via the titles of conversations (PMs).
CVE-2018-17996 MEDIUM 6.5 DOWNGRADE LayerBB before 1.1.3 allows CSRF for adding a user via admin/new_user.php, deleting a user via admin/members.p

References

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