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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| moinwiki | moin-1.9 | < 1.9.11 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 10 | moin | 1.9.9-1+deb10u1 | DSA-4787-1 |
| Debian 9 | moin | 1.9.9-1+deb9u2 | DLA-2446-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | moin | 1.9.9-1ubuntu1.2 | USN-4629-1 |
| Ubuntu 16.04 LTS | moin | 1.9.8-1ubuntu1.16.04.3 | USN-4629-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP2 | moinmoin-wiki | 1.9.11-bp152.4.3.1 | openSUSE-SU-2020:1998-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | moinmoin-wiki | 1.9.11-lp152.3.3.1 | openSUSE-SU-2020:1966-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | moin | < 1.9.11 | 1.9.11 | GHSA-4q96-6xhq-ff43 |
Advisories 5
- DSA-4787-1 moin - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2446-1 moin - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-4629-1 moin vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2020:1966-1 Security update for moinmoin-wiki SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1998-1 Security update for moinmoin-wiki SUSE / openSUSE Security Updates · Feb 4, 2026