CVE-2025-40729: Reflected Cross-Site Scripting (XSS) in /customer_support/index.php in Customer Support System v1.0, which all

Routine

MEDIUM 6.1DOWNGRADE

CVE-2025-40729 is a medium-severity flaw (CVSS 6.1) affecting customer support system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Reflected Cross-Site Scripting (XSS) in /customer_support/index.php in Customer Support System v1.0, which allows remote attackers to execute arbitrary code via the page parameter.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-06-16
Last modified	2026-06-17

Publisher (CNA): Spanish National Cybersecurity Institute, S.A. (INCIBE) · Vendor: oretnom23

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

Am I affected?

Timeline

2025-06-16 09:15 UTCPublished CVE record published
2026-06-17 09:22 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-2025-40729?

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

Is CVE-2025-40729 being exploited?

CVE-2025-40729 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-2025-40729 affect?

CVE-2025-40729 affects customer support system. Severity is medium (CVSS 6.1). Reflected Cross-Site Scripting (XSS) in /customer_support/index.php in Customer Support System v1.0, which allows remote attackers to execute arbitrary code via the page parameter.

How urgent is CVE-2025-40729?

Priority 30/100. No elevated risk signals yet.

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-2025-40728 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
CVE-2023-50070 HIGH 8.8 DOWNGRADE Sourcecodester Customer Support System 1.0 has multiple SQL injection vulnerabilities in /customer_support/aja

References

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