CVE-2020-18131: Cross Site Request Forgery (CSRF) vulnerability in Bluethrust Clan Scripts v4 allows attackers to escilate pri

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HIGH 8.8DOWNGRADE

CVE-2020-18131 is a high-severity flaw (CVSS 8.8) affecting clanscripts. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Request Forgery (CSRF) vulnerability in Bluethrust Clan Scripts v4 allows attackers to escilate privledges to an arbitrary account via a crafted request to /members/console.php?cID=5.

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	None
User interaction	Required
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-352
Published	2023-05-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: clanscripts project

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

Am I affected?

Timeline

2023-05-08 14:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

clanscripts project clanscripts DOWNGRADE

Affected: 4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy clanscripts || rpm -q clanscripts || clanscripts --version

2. No fixed release: DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison clanscripts sudo apt install clanscripts=<VERSION_BEFORE_4.0> sudo apt-mark hold clanscripts

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

dnf --showduplicates list clanscripts sudo dnf downgrade clanscripts-<VERSION_BEFORE_4.0> sudo dnf versionlock add clanscripts

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-2020-18131?

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

Is CVE-2020-18131 being exploited?

CVE-2020-18131 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-2020-18131 affect?

CVE-2020-18131 affects clanscripts. Severity is high (CVSS 8.8). Cross Site Request Forgery (CSRF) vulnerability in Bluethrust Clan Scripts v4 allows attackers to escilate privledges to an arbitrary account via a crafted request to /members/console.php?cID=5.

How urgent is CVE-2020-18131?

Priority 44/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

References

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