CVE-2018-18713: The function down_sql_action() in /admin/model/database.class.php in PHPYun 4.6 allows remote attackers to rea

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HIGH 7.5REMOTEDOWNGRADE

CVE-2018-18713 is a high-severity flaw (CVSS 7.5) affecting phpyun. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The function down_sql_action() in /admin/model/database.class.php in PHPYun 4.6 allows remote attackers to read arbitrary files via directory traversal in an m=database&c=down_sql&name=../ URI.

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Weakness	CWE-22
Published	2018-10-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: phpyun

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

Am I affected?

Timeline

2018-10-29 12:29 UTCPublished CVE record published
2026-06-17 01:47 UTCUpdated Record last modified

phpyun phpyun DOWNGRADE

Affected: 4.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.6 (Debian / Ubuntu)

apt-cache madison phpyun sudo apt install phpyun=<VERSION_BEFORE_4.6> sudo apt-mark hold phpyun

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

dnf --showduplicates list phpyun sudo dnf downgrade phpyun-<VERSION_BEFORE_4.6> sudo dnf versionlock add phpyun

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-2018-18713?

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

Is CVE-2018-18713 being exploited?

CVE-2018-18713 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-2018-18713 affect?

CVE-2018-18713 affects phpyun. Severity is high (CVSS 7.5). The function down_sql_action() in /admin/model/database.class.php in PHPYun 4.6 allows remote attackers to read arbitrary files via directory traversal in an m=database&c=down_sql&name=../ URI.

How urgent is CVE-2018-18713?

Priority 52/100. High severity; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2018-18626 HIGH 7.5 DOWNGRADE An issue was discovered in PHPYun V4.6

References

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