# CVE-2018-25338: Zechat 1.5 SQL Injection via hashtag parameter

> Unauthenticated attackers can extract database information via SQL injection in the hashtag parameter of Zechat.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 May 2026
- **Updated:** 18 May 2026
- **Also known as:** GHSA-67j6-rmc9-jfxj

## What is CVE-2018-25338?

CVE-2018-25338 is a high-severity SQL injection vulnerability in Bylancer Zechat, published on 17 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Zechat 1.5 contains a SQL injection vulnerability in the hashtag parameter that allows unauthenticated attackers to extract database information using union-based techniques. Attackers can exploit the hashtag parameter with union-based payloads to retrieve table and column names.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2018-25338?


## How do I fix CVE-2018-25338?

No fix has been published for CVE-2018-25338 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-25338 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25338 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-25338 and fix it if it is affected.

What it is: CVE-2018-25338 is a high-severity SQL injection vulnerability in Bylancer Zechat, published on 17 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25338 exists.

Affected product: Bylancer Zechat. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2018-25338/ (Markdown: https://insights.sbomify.com/CVE-2018-25338/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-25338
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-25338
- OSV: https://osv.dev/vulnerability/CVE-2018-25338

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-25338/
Summaries are generated and may contain mistakes; the official description above is the record.