CVE-2018-17836: An issue was discovered in JTBC(PHP) 3.0.1.6

This month

HIGH 8.8DOWNGRADE

CVE-2018-17836 is a high-severity flaw (CVSS 8.8) affecting jtbc php. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in JTBC(PHP) 3.0.1.6. It allows remote attackers to execute arbitrary PHP code by using a /console/file/manage.php?type=action&action=addfile&path=..%2F substring to upload, in conjunction with a multipart/form-data PHP payload.

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	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-22
Published	2018-10-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jtbc

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

Am I affected?

Timeline

2018-10-01 08:29 UTCPublished CVE record published
2026-06-17 01:46 UTCUpdated Record last modified

jtbc jtbc php DOWNGRADE

Affected: 3.0.1.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.1.6

1. Check installed version

apt-cache policy jtbc-php || rpm -q jtbc-php || jtbc-php --version

2. No fixed release: DOWNGRADE to a release before 3.0.1.6 (Debian / Ubuntu)

apt-cache madison jtbc-php sudo apt install jtbc-php=<VERSION_BEFORE_3.0.1.6> sudo apt-mark hold jtbc-php

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

dnf --showduplicates list jtbc-php sudo dnf downgrade jtbc-php-<VERSION_BEFORE_3.0.1.6> sudo dnf versionlock add jtbc-php

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-2018-17836?

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

Is CVE-2018-17836 being exploited?

CVE-2018-17836 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-2018-17836 affect?

CVE-2018-17836 affects jtbc php. Severity is high (CVSS 8.8). An issue was discovered in JTBC(PHP) 3.0.1.6. It allows remote attackers to execute arbitrary PHP code by using a /console/file/manage.php?type=action&action=addfile&path=..%2F substring to upload, in conjunction with a multipart/form-data

How urgent is CVE-2018-17836?

Priority 55/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2019-9662 HIGH 7.5 DOWNGRADE An issue was discovered in JTBC(PHP) 3.0.1.8
CVE-2019-8433 HIGH 7.5 DOWNGRADE JTBC(PHP) 3.0.1.8 allows Arbitrary File Upload via the console/#/console/file/manage.php?type=list URI, as dem
CVE-2018-19547 MEDIUM 6.1 DOWNGRADE JTBC(PHP) 3.0.1.7 has XSS via the console/xml/manage.php?type=action&action=edit content parameter.
CVE-2018-19546 HIGH 8.8 DOWNGRADE JTBC(PHP) 3.0.1.7 has CSRF via the console/xml/manage.php?type=action&action=edit URI, as demonstrated by an X
CVE-2018-19327 HIGH 8.8 DOWNGRADE An issue was discovered in JTBC(PHP) 3.0.1.7

References

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