CVE-2026-39349

from Crypto.Cipher import AES from Crypto.Util.Padding import pad import binascii # Simulating the vulnerable encryption mechanism in OrangeHRM # In a real scenario, the key would be extracted from the configuration key = b'0123456789ABCDEF' # 16 bytes key for AES-128 cipher = AES.new(key, AES.MODE_ECB) # Example 1: Encrypting a sensitive field (e.g., Salary: 5000) data_1 = "Salary: 5000" ct1 = cipher.encrypt(pad(data_1.encode(), AES.block_size)) # Example 2: Encrypting the same field again data_2 = "Salary: 5000" ct2 = cipher.encrypt(pad(data_2.encode(), AES.block_size)) # Example 3: Encrypting a different field (e.g., Salary: 6000) data_3 = "Salary: 6000" ct3 = cipher.encrypt(pad(data_3.encode(), AES.block_size)) print(f"Ciphertext 1 (Salary 5000): {binascii.hexlify(ct1).decode()}") print(f"Ciphertext 2 (Salary 5000): {binascii.hexlify(ct2).decode()}") print(f"Ciphertext 3 (Salary 6000): {binascii.hexlify(ct3).decode()}") # Proof of Concept: ECB Mode Pattern Disclosure if ct1 == ct2: print("\n[!] Vulnerability Confirmed: Identical plaintexts produce identical ciphertexts (Pattern Disclosure).") else: print("\n[+] Safe: Ciphertexts differ.") # Analysis: An attacker seeing ct1 and ct2 in the database knows the values are identical # without knowing the actual key.

{"cve": {"id": "CVE-2026-39349", "sourceIdentifier": "[email protected]", "published": "2026-04-07T19:16:46.067", "lastModified": "2026-04-10T19:32:40.850", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OrangeHRM is a comprehensive human resource management (HRM) system. From 5.0 to 5.8, OrangeHRM Open Source encrypts certain sensitive fields with AES in ECB mode, which preserves block-aligned plaintext patterns in ciphertext and enables pattern disclosure against stored data. This vulnerability is fixed in 5.8.1."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 2.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N", "baseScore": 2.7, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.2, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-326"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:orangehrm:orangehrm:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.8.1", "matchCriteriaId": "804C1EE9-4D17-4056-B3D6-1BDB9F0BB026"}]}]}], "references": [{"url": "https://github.com/orangehrm/orangehrm/security/advisories/GHSA-g29m-3jgj-gprg", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}