hunting-blind-and-second-order-sql-injection SKILL.md skillA
hunting-blind-and-second-order-sql-injection from unboundcompute/security-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add unboundcompute/security-agent-skills/hunting-blind-and-second-order-sql-injection@git:20260826.c45369bPins git:20260826.c45369b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- unboundcompute/security-agent-skills
- Path
skills/hunting-blind-and-second-order-sql-injection/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260826.c45369b, committed Aug 26, 2026
- Size
- 9,341 bytes
- Repository stars
- 26
- License
- MIT
Hunt the SQL injection that first-order testing misses: blind injection where the response carries no error or data and the signal is a boolean difference or a timing delay, and second-order injection where input is stored safely on one request and later concatenated into a query on a different code path. Covers values that reach a query only after being read back from the database, a cache, or a log, and sinks that reveal nothing directly so confirmation depends on an inferential channel. Use…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Hunting blind and second-order SQL injection: the paths first-order testing walks past Parameterized queries have made obvious SQL injection rare, but two variants survive because they defeat the usual way people test. Blind injection reaches a real query, but the response returns no error and no data, so a single probe looks inert; the vulnerability is real and confirmable only through an inferential channel, a boolean that flips the response or a deliberate time delay. Second-order injection is subtler: the input is stored correctly and safely on the request that accepts it, then read back later and concatenated into a query on an entirely different code path, so the endpoint that accepts the payload is not the endpoint that is vulnerable. You find both by following stored values to their later query uses and by treating no-output sinks as blind rather than safe. ## When to use - A value is stored on one request and later used to build a query on a different code path. - A parameter reaches a query whose response shows no error and no returned data. - Data read back from the database, a cache, a log, or a queue is concatenated into a later query. ## Scope check …
Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/hunting-blind-and-second-order-sql-injection@sha256:84ad4239a1f84667The line at the top of this page pins the label git:20260826.c45369b, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_eqlabultc2kvdwfk)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 26, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9341 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
unboundcompute/security-agent-skills · 26 stars · license MIT · pushed 2026-09-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_eqlabultc2kvdwfk GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/hunting-blind-and-second-order-sql-injection GET https://markdownregistry.com/api/v1/blob/84ad4239a1f8466739ffaad63acb6a84dfd554ba35d01578519770661ef912c0
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.