CVE-2021-37787: The unprivileged administrative interface in ABO.CMS version 5.8 through v.5.9.3 is affected by a SQL Injectio

Routine

MEDIUM 6.5REMOTEUPGRADE

CVE-2021-37787 is a medium-severity flaw (CVSS 6.5) affecting abo.cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The unprivileged administrative interface in ABO.CMS version 5.8 through v.5.9.3 is affected by a SQL Injection vulnerability via a HTTP POST request to the TinyMCE module

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-89
Published	2025-03-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: abocms

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

Am I affected?

Timeline

2025-03-11 18:15 UTCPublished CVE record published
2026-06-17 04:01 UTCUpdated Record last modified

abocms abo.cms UPGRADE

Affected: >= 5.8 and <= 5.9.3

Fixed in: newer than 5.9.3

Safe to downgrade to: a release before 5.8

1. Check installed version

apt-cache policy abo.cms || rpm -q abo.cms || abo.cms --version

2. UPGRADE to newer than 5.9.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade abo.cms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade abo.cms

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 5.8 (Debian / Ubuntu)

apt-cache madison abo.cms sudo apt install abo.cms=<VERSION_BEFORE_5.8> sudo apt-mark hold abo.cms

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

dnf --showduplicates list abo.cms sudo dnf downgrade abo.cms-<VERSION_BEFORE_5.8> sudo dnf versionlock add abo.cms

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-2021-37787?

abo.cms: upgrade to newer than 5.9.3. Exact commands for each OS are on this page.

Is CVE-2021-37787 being exploited?

CVE-2021-37787 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-2021-37787 affect?

CVE-2021-37787 affects abo.cms. Severity is medium (CVSS 6.5). The unprivileged administrative interface in ABO.CMS version 5.8 through v.5.9.3 is affected by a SQL Injection vulnerability via a HTTP POST request to the TinyMCE module

How urgent is CVE-2021-37787?

Priority 34/100. Remotely exploitable, no login, no user action

References

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