CVE-2020-18265: Cross Site Request Forgery (CSRF) in Simple-Log v1.6 allows remote attackers to gain privilege and execute arb

This month

HIGH 8.8DOWNGRADE

CVE-2020-18265 is a high-severity flaw (CVSS 8.8) affecting simple-log. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Request Forgery (CSRF) in Simple-Log v1.6 allows remote attackers to gain privilege and execute arbitrary code via the component "Simple-Log/admin/admin.php?act=act_add_member".

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	1.1% (top 36%)
CISA exploited list	No
Weakness	CWE-352
Published	2021-06-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: simple-log project

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

Am I affected?

Timeline

2021-06-07 19:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

simple-log project simple-log DOWNGRADE

Affected: 1.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6

1. Check installed version

apt-cache policy simple-log || rpm -q simple-log || simple-log --version

2. No fixed release: DOWNGRADE to a release before 1.6 (Debian / Ubuntu)

apt-cache madison simple-log sudo apt install simple-log=<VERSION_BEFORE_1.6> sudo apt-mark hold simple-log

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

dnf --showduplicates list simple-log sudo dnf downgrade simple-log-<VERSION_BEFORE_1.6> sudo dnf versionlock add simple-log

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-2020-18265?

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

Is CVE-2020-18265 being exploited?

CVE-2020-18265 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-2020-18265 affect?

CVE-2020-18265 affects simple-log. Severity is high (CVSS 8.8). Cross Site Request Forgery (CSRF) in Simple-Log v1.6 allows remote attackers to gain privilege and execute arbitrary code via the component "Simple-Log/admin/admin.php?act=act_add_member".

How urgent is CVE-2020-18265?

Priority 52/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2020-18264 HIGH 8.8 DOWNGRADE Cross Site Request Forgery (CSRF) in Simple-Log v1.6 allows remote attackers to gain privilege and execute arb

References

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