CVE-2026-28562: wpForo 2.4.14 contains an unauthenticated SQL injection vulnerability in Topics::get_topics() where the ORDER

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HIGH 8.2REMOTEUPGRADE

CVE-2026-28562 is a high-severity flaw (CVSS 8.2) affecting wpforo forum. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

wpForo 2.4.14 contains an unauthenticated SQL injection vulnerability in Topics::get_topics() where the ORDER BY clause relies on ineffective esc_sql() sanitization on unquoted identifiers. Attackers exploit the wpfob parameter with CASE WHEN payloads to perform blind boolean extraction of credentials from the WordPress database.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-89
Published	2026-02-28
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: gvectors

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

Am I affected?

Timeline

2026-02-28 22:16 UTCPublished CVE record published
2026-06-17 10:28 UTCUpdated Record last modified

gvectors wpforo forum UPGRADE

Affected: >= 2.4.0 and < 2.4.15

Fixed in: 2.4.15

Safe to downgrade to: a release before 2.4.0

1. Check installed version

apt-cache policy wpforo-forum || rpm -q wpforo-forum || wpforo-forum --version

2. UPGRADE to 2.4.15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wpforo-forum

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wpforo-forum

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 2.4.0 (Debian / Ubuntu)

apt-cache madison wpforo-forum sudo apt install wpforo-forum=<VERSION_BEFORE_2.4.0> sudo apt-mark hold wpforo-forum

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

dnf --showduplicates list wpforo-forum sudo dnf downgrade wpforo-forum-<VERSION_BEFORE_2.4.0> sudo dnf versionlock add wpforo-forum

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-2026-28562?

wpforo forum: upgrade to 2.4.15. Exact commands for each OS are on this page.

Is CVE-2026-28562 being exploited?

CVE-2026-28562 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-2026-28562 affect?

CVE-2026-28562 affects wpforo forum. Severity is high (CVSS 8.2). wpForo 2.4.14 contains an unauthenticated SQL injection vulnerability in Topics::get_topics() where the ORDER BY clause relies on ineffective esc_sql() sanitization on unquoted identifiers. Attackers exploit the wpfob parameter with CASE WH

How urgent is CVE-2026-28562?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities

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References

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