feat(ssrf): add blind SSRF (OAST) multiparam template

[HamzaSahin61]

Template / PR Information

Adds a blind SSRF detector using OAST across common URL/redirect parameters:
url, next, redirect, continue, download, image, feed, callback, return.

Path
http/vulnerabilities/ssrf/blind-ssrf-oast-multiparam.yaml

Why
Server-side URL fetch/redirect endpoints often accept external URLs.
This template confirms SSRF via OAST interaction, reducing false positives.

Template Validation

I've validated this template locally:

• YES

Sample run (anonymized)

# OAST client in background
interactsh-client -o hits.txt &

# sample run (example target; real targets omitted)
nuclei -u https://example.com \
  -t http/vulnerabilities/ssrf/blind-ssrf-oast-multiparam.yaml \
  -rl 10 -c 10 -retries 1 -stats

[DhiyaneshGeek]

Hi @HamzaSahin61

Thanks for sharing the template, we already have template for this in DAST format dast/vulnerabilities/ssrf/response-ssrf.yaml

Due to the following reason, we are closing this PR