CVE-2015-5216: The Identity Provider (IdP) server in Ipsilon 0.1.0 before 1.0.1 does not properly escape certain characters i

Routine

MEDIUM 6.1UPGRADE

CVE-2015-5216 is a medium-severity flaw (CVSS 6.1) affecting ipsilon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Identity Provider (IdP) server in Ipsilon 0.1.0 before 1.0.1 does not properly escape certain characters in a Python exception-message template, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via an HTTP response.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-02-17
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: ipsilon-project

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

Am I affected?

Timeline

2020-02-17 19:15 UTCPublished CVE record published
2026-06-17 00:28 UTCUpdated Record last modified

ipsilon-project ipsilon UPGRADE

Affected: >= 0.1.0 and < 1.0.1

Fixed in: 1.0.1

Safe to downgrade to: a release before 0.1.0

1. Check installed version

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

2. UPGRADE to 1.0.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ipsilon

Note

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

3. If no update is available yet, DOWNGRADE to a release before 0.1.0 (Debian / Ubuntu)

apt-cache madison ipsilon sudo apt install ipsilon=<VERSION_BEFORE_0.1.0> sudo apt-mark hold ipsilon

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ipsilon sudo dnf downgrade ipsilon-<VERSION_BEFORE_0.1.0> sudo dnf versionlock add ipsilon

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2015-5216?

ipsilon: upgrade to 1.0.1. Exact commands for each OS are on this page.

Is CVE-2015-5216 being exploited?

CVE-2015-5216 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-2015-5216 affect?

CVE-2015-5216 affects ipsilon. Severity is medium (CVSS 6.1). The Identity Provider (IdP) server in Ipsilon 0.1.0 before 1.0.1 does not properly escape certain characters in a Python exception-message template, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks vi

How urgent is CVE-2015-5216?

Priority 39/100. No elevated risk signals yet.

Software pages

Python vulnerabilities

Related CVEs

CVE-2015-5215 MEDIUM 6.1 UPGRADE The default configuration of the Jinja templating engine used in the Identity Provider (IdP) server in Ipsilon

References

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