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bdu:2021-01734

cnvd-2020-62997

EUVD-2026-42800

fkie_cve-2020-15275

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.

GHSA-4q96-6xhq-ff43 — malicious SVG attachment causing stored XSS vulnerability

Affected: PyPI: moin

### Impact 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.

### Patches 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.

### Workarounds It is not advised to work around this, but to upgrade MoinMoin to a patched version.

That said, a work around via a Content Security Policy in the web server might be possible.

Also, it is of course helpful if you give `write` permissions (which include uploading attachments) only to trusted users.

### For more information If you have any questions or comments about this advisory, email me at [twaldmann@thinkmo.de](mailto:twaldmann@thinkmo.de).

### Credits

This vulnerability was discovered by:

Catarina Leite from the Checkmarx SCA AppSec team

gsd-2020-15275

openSUSE-SU-2020:1966-1 — Security update for moinmoin-wiki

Security update for moinmoin-wiki

PYSEC-2020-241

Affected: PyPI: moin

UBUNTU-CVE-2020-15275

Affected: Ubuntu:16.04:LTS: moin, Ubuntu:18.04:LTS: moin