CVE-2020-28091: cxuucms v3 has a SQL injection vulnerability, which can lead to the leakage of all database data via the keywo

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2020-28091 is a high-severity flaw (CVSS 7.5) affecting cxuucms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

cxuucms v3 has a SQL injection vulnerability, which can lead to the leakage of all database data via the keywords parameter via search.php.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.8% (top 10%)
CISA exploited list	No
Weakness	CWE-89
Published	2020-11-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cxuu

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

Am I affected?

Timeline

2020-11-18 17:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

cxuu cxuucms DOWNGRADE

Affected: 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.0 (Debian / Ubuntu)

apt-cache madison cxuucms sudo apt install cxuucms=<VERSION_BEFORE_3.0> sudo apt-mark hold cxuucms

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cxuucms sudo dnf downgrade cxuucms-<VERSION_BEFORE_3.0> sudo dnf versionlock add cxuucms

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.

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: xuucms 3 - 'keywords' SQL Injection

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-2020-28091?

cxuucms: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-28091 being exploited?

CVE-2020-28091 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-2020-28091 affect?

CVE-2020-28091 affects cxuucms. Severity is high (CVSS 7.5). cxuucms v3 has a SQL injection vulnerability, which can lead to the leakage of all database data via the keywords parameter via search.php.

How urgent is CVE-2020-28091?

Priority 59/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-42970 MEDIUM 6.1 DOWNGRADE Cross Site Scripting (XSS) vulnerability exists in cxuucms v3 via the imgurl of /feedback/post/ content parame
CVE-2021-3264 HIGH 7.2 DOWNGRADE SQL Injection vulnerability in cxuucms 3.1 ivia the pid parameter in public/admin.php.
CVE-2021-39599 MEDIUM 6.1 DOWNGRADE Multiple Cross Site Scripting (XSS) vulnerabilities exists in CXUUCMS 3.1 in the search and c parameters in (1
CVE-2020-35347 MEDIUM 6.5 DOWNGRADE CXUUCMS V3 3.1 has a CSRF vulnerability that can add an administrator account via admin.php?c=adminuser&a=add.
CVE-2020-35346 MEDIUM 4.8 DOWNGRADE CXUUCMS V3 3.1 is affected by a reflected XSS vulnerability that allows remote attackers to inject arbitrary w

References

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