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CVE-2018-6389

CWE-400Published: February 6, 2018· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

In WordPress through 4.9.2, unauthenticated attackers can cause a denial of service (resource consumption) by using the large list of registered .js files (from wp-includes/script-loader.php) to construct a series of requests to load every file many times.

Technical Analysis

CVE-2018-6389 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

A proof-of-concept (PoC) exploit exists for CVE-2018-6389. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

WordPress1 product(s)

wordpress

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.securityfocus.com/bid/103060

ADVISORYhttp://www.securitytracker.com/id/1040347

ADVISORYhttps://baraktawily.blogspot.fr/2018/02/how-to-dos-29-of-world-wide-websites.html

ADVISORYhttps://github.com/UltimateHackers/Shiva

ADVISORYhttps://github.com/WazeHell/CVE-2018-6389

ADVISORYhttps://thehackernews.com/2018/02/wordpress-dos-exploit.html

ADVISORYhttps://wpvulndb.com/vulnerabilities/9021

ADVISORYhttps://www.exploit-db.com/exploits/43968/

ADVISORYhttp://www.securityfocus.com/bid/103060

ADVISORYhttp://www.securitytracker.com/id/1040347

ADVISORYhttps://baraktawily.blogspot.fr/2018/02/how-to-dos-29-of-world-wide-websites.html

ADVISORYhttps://github.com/UltimateHackers/Shiva

ADVISORYhttps://github.com/WazeHell/CVE-2018-6389

ADVISORYhttps://thehackernews.com/2018/02/wordpress-dos-exploit.html

ADVISORYhttps://wpvulndb.com/vulnerabilities/9021

ADVISORYhttps://www.exploit-db.com/exploits/43968/

All References (16)

→

http://www.securityfocus.com/bid/103060Third Party Advisory · VDB Entry

→

http://www.securitytracker.com/id/1040347Third Party Advisory · VDB Entry

→

https://baraktawily.blogspot.fr/2018/02/how-to-dos-29-of-world-wide-websites.htmlExploit · Issue Tracking · Third Party Advisory

→

https://github.com/UltimateHackers/ShivaExploit · Third Party Advisory

→

https://github.com/WazeHell/CVE-2018-6389Third Party Advisory

→

https://thehackernews.com/2018/02/wordpress-dos-exploit.htmlExploit · Third Party Advisory

→

https://wpvulndb.com/vulnerabilities/9021Third Party Advisory

→

https://www.exploit-db.com/exploits/43968/Exploit · Third Party Advisory · VDB Entry

→

http://www.securityfocus.com/bid/103060Third Party Advisory · VDB Entry

→

http://www.securitytracker.com/id/1040347Third Party Advisory · VDB Entry

→

https://baraktawily.blogspot.fr/2018/02/how-to-dos-29-of-world-wide-websites.htmlExploit · Issue Tracking · Third Party Advisory

→

https://github.com/UltimateHackers/ShivaExploit · Third Party Advisory

→

https://github.com/WazeHell/CVE-2018-6389Third Party Advisory

→

https://thehackernews.com/2018/02/wordpress-dos-exploit.htmlExploit · Third Party Advisory

→

https://wpvulndb.com/vulnerabilities/9021Third Party Advisory

Quick Facts

CVE IDCVE-2018-6389

CVSS Score7.5 / 10

SeverityHIGH

WeaknessCWE-400

CISA KEVNo

ExploitPOC

Affected1 vendor(s)

PublishedFeb 6, 2018

Related CVEs (CWE-400)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2018-6389 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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