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H5P (WordPress plugin) CVE-2026-57321

| EUVDEUVD-2026-39733 HIGH
Path Traversal (CWE-22)
2026-06-26 audit@patchstack.com GHSA-6pq6-5jrw-hgmm
7.1
CVSS 3.1 · Vendor: patchstack
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Severity by source

Vendor (patchstack) PRIMARY
7.1 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
vuln.today AI
7.1 HIGH

Authenticated Contributor reachable over the network (AV:N, PR:L); file deletion yields high availability and partial integrity impact but no data disclosure (C:N, I:L, A:H).

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (patchstack).

CVSS VectorVendor: patchstack

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

Lifecycle Timeline

1
Analysis Generated
Jun 26, 2026 - 15:52 vuln.today

DescriptionCVE.org

Contributor Arbitrary File Deletion in H5P <= 1.17.7 versions.

AnalysisAI

Arbitrary file deletion in the H5P WordPress plugin (versions 1.17.7 and earlier) lets a low-privileged authenticated user with Contributor-level access delete arbitrary files on the server via path traversal. The CVSS:3.1 vector (AV:N/PR:L) confirms remote, low-privilege exploitation with high availability impact, and no public exploit has been identified at time of analysis. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate as Contributor
Delivery
Craft H5P request with ../ traversal path
Exploit
Invoke file-deletion code path
Execution
Delete arbitrary server file (e.g. wp-config.php)
Impact
Cause outage or enable site takeover

Vulnerability AssessmentAI

Exploitation Exploitation requires a valid authenticated WordPress account with at least Contributor-level privileges (matching CVSS PR:L) on a site running the H5P plugin at version 1.17.7 or earlier; the attacker uses an H5P content/library file operation to supply a traversal path that escapes the H5P content directory. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Signals are moderate and broadly consistent rather than conflicting. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker registers or compromises a Contributor account on a multi-author WordPress site running H5P <= 1.17.7, then issues a crafted H5P content request containing path-traversal sequences that point at a sensitive file such as wp-config.php. The plugin deletes the targeted file, causing site outage or, where WordPress then enters setup mode, enabling a follow-on takeover. …
Remediation Upgrade the H5P plugin to the first release published after 1.17.7 that addresses this issue; a released patched version is not independently confirmed in the provided data, so verify the fixed version against the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/h5p/vulnerability/wordpress-h5p-plugin-1-17-7-arbitrary-file-deletion-vulnerability?_s_id=cve) and the plugin's WordPress.org changelog before deploying. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

24 hours: Inventory all WordPress installations running H5P plugin v1.17.7 or earlier; identify users with Contributor role or equivalent capabilities. …

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CVE-2026-57321 vulnerability details – vuln.today

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