# CVE-2026-21627: SQL injection in Advanced Custom Fields

> Attackers can exploit SQL injection and unauthenticated file read vulnerabilities in the Novarain/Tassos Framework plugin for Joomla via AJAX requests.

- **Severity:** Critical 9.5 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Feb 2026
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-wc6r-7g4j-c7x4

## What is CVE-2026-21627?

CVE-2026-21627 is a critical SQL injection vulnerability in tassos.gr Advanced Custom Fields, published on 20 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The vulnerability was rooted in how the Tassos Framework plugin handled specific AJAX requests through Joomla’s com_ajax entry point. Under certain conditions, internal framework functionality could be invoked without proper restriction.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-21627?


## How do I fix CVE-2026-21627?

No fix has been published for CVE-2026-21627 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-21627 being exploited?

There is no known exploitation of CVE-2026-21627 in the wild and no public exploit code.

Public exploit code:

- Vulnerability: Unauthenticated Arbitrary PHP File Inclusion via ajaxTaskInclude() (github_poc): https://github.com/yallasec/CVE-2026-21627---Tassos-Novarain-Framework-plg_system_nrframework-Exploit---Joomla
- CVE-2026-21627 proof of concept  and exploit script  (github_poc): https://github.com/SAIM28826/CVE-2026-21627

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-21627 and fix it if it is affected.

What it is: CVE-2026-21627 is a critical SQL injection vulnerability in tassos.gr Advanced Custom Fields, published on 20 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-21627 in the wild and no public exploit code.

Affected product: tassos.gr Advanced Custom Fields. 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-2026-21627/ (Markdown: https://insights.sbomify.com/CVE-2026-21627/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-21627
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-21627
- OSV: https://osv.dev/vulnerability/CVE-2026-21627

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-21627/
Summaries are generated and may contain mistakes; the official description above is the record.