CVE-2023-49547: Customer Support System v1 was discovered to contain a SQL injection vulnerability via the username parameter

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2023-49547 is a critical-severity flaw (CVSS 9.8) affecting customer support system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Customer Support System v1 was discovered to contain a SQL injection vulnerability via the username parameter at /customer_support/ajax.php?action=login.

Why this priority

Critical 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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 33%)
CISA exploited list	No
Weakness	CWE-89
Published	2024-03-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: oretnom23

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

Am I affected?

Timeline

2024-03-05 00:15 UTCPublished CVE record published
2026-06-17 06:36 UTCUpdated Record last modified

oretnom23 customer support system DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy customer-support-system || rpm -q customer-support-system || customer-support-system --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison customer-support-system sudo apt install customer-support-system=<VERSION_BEFORE_1.0> sudo apt-mark hold customer-support-system

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

dnf --showduplicates list customer-support-system sudo dnf downgrade customer-support-system-<VERSION_BEFORE_1.0> sudo dnf versionlock add customer-support-system

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-2023-49547?

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

Is CVE-2023-49547 being exploited?

CVE-2023-49547 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-2023-49547 affect?

CVE-2023-49547 affects customer support system. Severity is critical (CVSS 9.8). Customer Support System v1 was discovered to contain a SQL injection vulnerability via the username parameter at /customer_support/ajax.php?action=login.

How urgent is CVE-2023-49547?

Priority 61/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2025-70141 CRITICAL 9.4 DOWNGRADE SourceCodester Customer Support System 1.0 contains an incorrect access control vulnerability in ajax.php
CVE-2025-40729 MEDIUM 6.1 DOWNGRADE Reflected Cross-Site Scripting (XSS) in /customer_support/index.php in Customer Support System v1.0, which all
CVE-2025-40728 HIGH 8.8 DOWNGRADE SQL injection vulnerability in Customer Support System v1.0
CVE-2023-51281 MEDIUM 5.4 DOWNGRADE Cross Site Scripting vulnerability in Customer Support System v.1.0 allows a remote attacker to escalate privi
CVE-2023-50071 HIGH 8.8 DOWNGRADE Sourcecodester Customer Support System 1.0 has multiple SQL injection vulnerabilities in /customer_support/aja

References

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