CVE-2018-6879: PHP Scripts Mall Website Seller Script 2.0.3 uses the client side to enforce validation of an e-mail address,

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HIGH 8.8DOWNGRADE

CVE-2018-6879 is a high-severity flaw (CVSS 8.8) affecting website seller script. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PHP Scripts Mall Website Seller Script 2.0.3 uses the client side to enforce validation of an e-mail address, which allows remote attackers to modify a registered e-mail address by removing the validation code.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-20
Published	2018-04-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: website seller script project

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

Am I affected?

Timeline

2018-04-12 22:29 UTCPublished CVE record published
2026-06-17 02:02 UTCUpdated Record last modified

website seller script project website seller script DOWNGRADE

Affected: 2.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.3

1. Check installed version

apt-cache policy website-seller-script || rpm -q website-seller-script || website-seller-script --version

2. No fixed release: DOWNGRADE to a release before 2.0.3 (Debian / Ubuntu)

apt-cache madison website-seller-script sudo apt install website-seller-script=<VERSION_BEFORE_2.0.3> sudo apt-mark hold website-seller-script

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

dnf --showduplicates list website-seller-script sudo dnf downgrade website-seller-script-<VERSION_BEFORE_2.0.3> sudo dnf versionlock add website-seller-script

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-2018-6879?

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

Is CVE-2018-6879 being exploited?

CVE-2018-6879 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-2018-6879 affect?

CVE-2018-6879 affects website seller script. Severity is high (CVSS 8.8). PHP Scripts Mall Website Seller Script 2.0.3 uses the client side to enforce validation of an e-mail address, which allows remote attackers to modify a registered e-mail address by removing the validation code.

How urgent is CVE-2018-6879?

Priority 52/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2018-6870 MEDIUM 6.1 DOWNGRADE Reflected XSS exists in PHP Scripts Mall Website Seller Script 2.0.3 via the Listings Search feature.
CVE-2018-20631 MEDIUM 5.3 DOWNGRADE PHP Scripts Mall Website Seller Script 2.0.5 allows full Path Disclosure via a request for an arbitrary image
CVE-2018-20530 MEDIUM 5.4 DOWNGRADE PHP Scripts Mall Website Seller Script 2.0.5 has XSS via a Profile field such as Company Address, a related is
CVE-2018-16456 MEDIUM 6.1 DOWNGRADE PHP Scripts Mall Website Seller Script 2.0.5 has XSS via a keyword
CVE-2018-15897 MEDIUM 6.5 DOWNGRADE PHP Scripts Mall Website Seller Script 2.0.5 allows remote attackers to cause a denial of service via crafted

References

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