CVE-2020-20466: White Shark System (WSS) 1.3.2 is vulnerable to unauthorized access via user_edit_password.php, remote attacke

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-20466 is a critical-severity flaw (CVSS 9.8) affecting white shark systems. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

White Shark System (WSS) 1.3.2 is vulnerable to unauthorized access via user_edit_password.php, remote attackers can modify the password of any user.

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	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-863
Published	2021-06-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: white shark systems project

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

Am I affected?

Timeline

2021-06-21 04:15 UTCPublished CVE record published
2026-06-17 03:03 UTCUpdated Record last modified

white shark systems project white shark systems DOWNGRADE

Affected: 1.3.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.2

1. Check installed version

apt-cache policy white-shark-systems || rpm -q white-shark-systems || white-shark-systems --version

2. No fixed release: DOWNGRADE to a release before 1.3.2 (Debian / Ubuntu)

apt-cache madison white-shark-systems sudo apt install white-shark-systems=<VERSION_BEFORE_1.3.2> sudo apt-mark hold white-shark-systems

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

dnf --showduplicates list white-shark-systems sudo dnf downgrade white-shark-systems-<VERSION_BEFORE_1.3.2> sudo dnf versionlock add white-shark-systems

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-2020-20466?

white shark systems: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-20466 being exploited?

CVE-2020-20466 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-2020-20466 affect?

CVE-2020-20466 affects white shark systems. Severity is critical (CVSS 9.8). White Shark System (WSS) 1.3.2 is vulnerable to unauthorized access via user_edit_password.php, remote attackers can modify the password of any user.

How urgent is CVE-2020-20466?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2020-20474 HIGH 7.5 DOWNGRADE White Shark System (WSS) 1.3.2 has a SQL injection vulnerability
CVE-2020-20473 HIGH 7.5 DOWNGRADE White Shark System (WSS) 1.3.2 has a SQL injection vulnerability
CVE-2020-20472 MEDIUM 5.3 DOWNGRADE White Shark System (WSS) 1.3.2 has a sensitive information disclosure vulnerability
CVE-2020-20471 HIGH 8.8 DOWNGRADE White Shark System (WSS) 1.3.2 has an unauthorized access vulnerability in default_user_edit.php, remote attac
CVE-2020-20470 MEDIUM 5.3 DOWNGRADE White Shark System (WSS) 1.3.2 has web site physical path leakage vulnerability.

References

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