CVE-2023-43331: A cross-site scripting (XSS) vulnerability in the Add User function of Small CRM v3.0 allows attackers to exec

Routine

MEDIUM 5.4DOWNGRADE

CVE-2023-43331 is a medium-severity flaw (CVSS 5.4) affecting small crm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A cross-site scripting (XSS) vulnerability in the Add User function of Small CRM v3.0 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Name field.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-09-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: small crm project

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

Am I affected?

Timeline

2023-09-27 15:19 UTCPublished CVE record published
2026-06-17 06:25 UTCUpdated Record last modified

small crm project small crm 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 small-crm || rpm -q small-crm || small-crm --version

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

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

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

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

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-2023-43331?

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

Is CVE-2023-43331 being exploited?

CVE-2023-43331 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-2023-43331 affect?

CVE-2023-43331 affects small crm. Severity is medium (CVSS 5.4). A cross-site scripting (XSS) vulnerability in the Add User function of Small CRM v3.0 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Name field.

How urgent is CVE-2023-43331?

Priority 35/100. Public exploit reference

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References

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