# CVE-2025-43703: Security feature bypass in Anki

> Attackers can bypass API key restrictions via crafted shared decks, gaining unauthorized access to the internal API and potentially executing code.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 16 Apr 2025
- **Updated:** 17 Apr 2025
- **Also known as:** GHSA-634v-x2r3-jm25, UBUNTU-CVE-2025-43703

## What is CVE-2025-43703?

CVE-2025-43703 is a medium-severity vulnerability in Ankitects Anki, published on 16 Apr 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

An issue was discovered in Ankitects Anki through 25.02. A crafted shared deck can result in attacker-controlled access to the internal API (even though the attacker has no knowledge of an API key) through approaches such as scripts or the SRC attribute of an IMG element. NOTE: this issue exists because of an incomplete fix for CVE-2024-32484.

Weakness: CWE-830 (Inclusion of Web Functionality from an Untrusted Source)

## Which versions are affected by CVE-2025-43703?

It affects 1 product.


Products: Ankitects Anki.

## How do I fix CVE-2025-43703?

No fix has been published for CVE-2025-43703 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-43703 being exploited?

There is no known exploitation of CVE-2025-43703 in the wild and no public exploit code.

## Other vulnerabilities in Ankitects Anki

- [CVE-2024-32484](https://insights.sbomify.com/CVE-2024-32484/): Cross-site scripting in Anki (high 7.4)
- [CVE-2025-62185](https://insights.sbomify.com/CVE-2025-62185/): Code injection in Anki (medium 6.7)
- [CVE-2025-62186](https://insights.sbomify.com/CVE-2025-62186/): Command injection in Anki (medium 6.7)
- [CVE-2024-32152](https://insights.sbomify.com/CVE-2024-32152/): Ankitects Anki LaTeX Blocklist Bypass vulnerability (low 3.1)
- [CVE-2025-62187](https://insights.sbomify.com/CVE-2025-62187/): Path traversal in Anki (low 2.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-43703 and fix it if it is affected.

What it is: CVE-2025-43703 is a medium-severity vulnerability in Ankitects Anki, published on 16 Apr 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-43703 in the wild and no public exploit code.

Affected product: Ankitects Anki. 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-2025-43703/ (Markdown: https://insights.sbomify.com/CVE-2025-43703/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-43703
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-43703
- OSV: https://osv.dev/vulnerability/CVE-2025-43703

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-43703/
Summaries are generated and may contain mistakes; the official description above is the record.