harisec

@harisec.bsky.social

Interested in web security, bug bounties, machine learning and investing. SolidGoldMagikarp

I wrote an article about how it's possible to use Assistant Prefill to jailbreak LLMs (Large Language Models). Here is an example of the latest model from Microsoft (Phi-4) writing a phishing email:

Bild

FYI, here's the entire code to create a dataset of every single bsky message in real time: ``` from atproto import * def f(m): print(m.header, parse_subscribe_repos_message()) FirehoseSubscribeReposClient().start(f) ```

A librarian that previously worked at the British Library created a relatively small dataset of bsky posts, hundreds of times smaller than previous researchers, to help folks create toxicity filters and stuff. So people bullied him & posted death threats. He took it down. Nice one, folks.

Earlier this year, Assetnote's Security Research team discovered a vulnerability in Sitecore XP (CVE-2024-46938) that can lead to pre-authentication RCE. Order of operations bugs are one of my favorite types of bugs :) Write up and exploit script here: assetnote.io/resources/re...

Bild

Recraft's new model, unlike typical diffusion models, can handle math and geography - a surprising capability for an image generator. I wrote an article about abusing this functionality to leak its system prompt (using only generated images). www.invicti.com/blog/securit...

System prompt exposure: how AI image generators may leak sensitive instructions

Recraft's image generation service uses a unique architecture combining an LLM (Claude) with a diffusion model. Learn what led to the discovery that carefully crafted prompts could expose the system's...

invicti.com