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CVE-2026-18855Suited to automated attack · CISA

Link Library <= 7.9.4 - Unauthenticated Arbitrary File Deletion via link_url Parameter

CVSS score

9.1

EPSS probability

%1.4

Risk score

0.1

Published

1 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-18855 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

The Link Library plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the ll_delete_link_fields function in all versions up to, and including, 7.9.4 This makes it possible for unauthenticated attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). Exploitation requires the administrator to have enabled the 'Delete local file on link deletion' plugin option (disabled by default) and to subsequently permanently delete the attacker-submitted link, which is a routine moderation action.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-18855 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1jackdeweyLink Library View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
9.1CVSS V3_1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HCVE CNA
9.1CVSS V31CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-18855 is associated with the following CWEs:

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-18855 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://www.wordfence.com/threat-intel/vulnerabilities/id/41327dfa-db64-476a-a263-7bd4f69fb857?source=cvevendor-advisoryhttps://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library-admin.php#L7874vendor-advisoryhttps://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library-admin.php#L7865vendor-advisoryhttps://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/usersubmission.php#L52vendor-advisoryhttps://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/usersubmission.php#L476vendor-advisoryhttps://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library.php#L2288vendor-advisoryhttps://plugins.trac.wordpress.org/changeset?reponame=&new=3646361%40link-library%2Ftags%2F7.9.5&old=3626573%40link-library%2Ftags%2F7.9.4vendor-advisoryhttps://plugins.trac.wordpress.org/changeset/3646360/link-library/trunk/link-library-admin.phpvendor-advisoryhttps://plugins.trac.wordpress.org/changeset?old_path=%2Flink-library/tags/7.9.4&new_path=%2Flink-library/tags/7.9.5vendor-advisory

CVSS Vector Radar Chart

9.1 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

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J
jackdewey logo
jackdewey

Weakness Type (CWE & CAPEC)

CWE-22

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