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No exploitation reported

CVE-2026-118063

Advance Guest Post <= 1.9 - Unauthenticated Arbitrary File Upload via gallery_action

No exploitation reported by the sources we read.

  • Published2026-11-13
  • WeaknessCWE-434

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The Advance Guest Post WordPress plugin through 1.9 does not properly validate uploaded files, relying on a case-sensitive and incomplete extension check that unauthenticated users can trivially bypass, allowing them to upload arbitrary files, including executable PHP variants, into a web-reachable directory, which can lead to remote code execution depending on the server configuration.

Timeline

dates in UTC
  1. 2026-11-1306:00CVE publishedCNA

Versions per branch

Products declared by the CNA

As WPScan, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Unknown Advance Guest Postother versions: unknown
    Affected
    • ≤ 1.9no fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-13

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-118063 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-11-13
Last Modified
2026-11-13
NVD status
Deferred
GitHub Advisory
GHSA-rqj9-6qp6-c345

Frequently asked questions

What is CVE-2026-118063?

The Advance Guest Post WordPress plugin through 1.9 does not properly validate uploaded files, relying on a case-sensitive and incomplete extension check that unauthenticated users can trivially bypass, allowing them to upload arbitrary files, including executable PHP variants, into a web-reachable directory, which can lead to remote code execution depending on the server configuration.

Is CVE-2026-118063 actively exploited?

Active exploitation of CVE-2026-118063 has not been confirmed.

What is the CVSS score for CVE-2026-118063?

CVE-2026-118063 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

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