CVE-2020-15275: MoinMoin is a wiki engine

Q: How do I fix CVE-2020-15275?

moinmoin: upgrade to 1.9.11. Exact commands for each OS are on this page.

Q: Is CVE-2020-15275 being exploited?

CVE-2020-15275 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-15275 affect?

CVE-2020-15275 affects moinmoin. Severity is high (CVSS 8.7). 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 S

Q: How urgent is CVE-2020-15275?

Priority 55/100. High severity; Public exploit reference

This month

HIGH 8.7UPGRADE

CVE-2020-15275 is a high-severity flaw (CVSS 8.7) affecting moinmoin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.7% (top 22%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-11-11
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: moinmo

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-11-11 16:15 UTCPublished CVE record published
2026-06-17 02:56 UTCUpdated Record last modified

moinmo moinmoin UPGRADE

Affected: < 1.9.11

Fixed in: 1.9.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy moinmoin || rpm -q moinmoin || moinmoin --version

2. UPGRADE to 1.9.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade moinmoin

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade moinmoin

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-15275?

moinmoin: upgrade to 1.9.11. Exact commands for each OS are on this page.

Is CVE-2020-15275 being exploited?

CVE-2020-15275 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-15275 affect?

CVE-2020-15275 affects moinmoin. Severity is high (CVSS 8.7). 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 S

How urgent is CVE-2020-15275?

Priority 55/100. High severity; Public exploit reference

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References

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