CVE-2020-15275: malicious SVG attachment causing stored XSS vulnerability in MoinMoin
First published: Wed Nov 11 2020(Updated: )
### 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
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/moin | 1.9.9-1+deb10u1 | |
| Moinmo Moinmoin | <1.9.11 | |
| pip/moin | <1.9.11 | 1.9.11 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://github.com/moinwiki/moin-1.9/security/advisories/GHSA-4q96-6xhq-ff43
- https://github.com/moinwiki/moin-1.9/commit/64e16037a60646a4d834f0203c75481b9c3fa74c
- https://security-tracker.debian.org/tracker/CVE-2020-15275
- https://advisory.checkmarx.net/advisory/CX-2020-4285
- https://github.com/moinwiki/moin-1.9/commit/31de9139d0aabc171e94032168399b4a0b2a88a2
- https://github.com/moinwiki/moin-1.9/releases/tag/1.9.11
- https://nvd.nist.gov/vuln/detail/CVE-2020-15275
- https://github.com/pypa/advisory-database/tree/main/vulns/moin/PYSEC-2020-241.yaml
- https://pypi.org/project/moin
- https://github.com/advisories/GHSA-4q96-6xhq-ff43 (Advisory)
- collector/security-tracker-debian
- collector/nvd-index
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/title
- agent/remedy
- agent/severity
- agent/weakness
- agent/first-publish-date
- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-4q96-6xhq-ff43
- alias/CVE-2020-15275
- agent/software-canonical-lookup
- agent/references
- agent/last-modified-date
- agent/softwarecombine
- agent/description
- agent/event
- collector/nvd-cve
- source/NVD
- agent/author
- agent/tags
- collector/github-advisory
- package-manager/debian
- vendor/moinmo
- canonical/moinmo moinmoin
- package-manager/pip