CVE-2017-9306: inc/SP/Html/Html.class.php in sysPass 2.1.9 allows remote attackers to bypass the XSS filter, as demonstrated

Q: How urgent is CVE-2017-9306?

Priority 42/100. Public exploit reference

This month

MEDIUM 6.1DOWNGRADE

CVE-2017-9306 is a medium-severity flaw (CVSS 6.1) affecting syspass. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

inc/SP/Html/Html.class.php in sysPass 2.1.9 allows remote attackers to bypass the XSS filter, as demonstrated by use of an "<svg/onload=" substring instead of an "<svg onload=" substring.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-79
Published	2017-05-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: syspass

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

Am I affected?

Timeline

2017-05-31 04:29 UTCPublished CVE record published
2026-06-17 01:27 UTCUpdated Record last modified

syspass syspass DOWNGRADE

Affected: 2.1.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.9

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.1.9 (Debian / Ubuntu)

apt-cache madison syspass sudo apt install syspass=<VERSION_BEFORE_2.1.9> sudo apt-mark hold syspass

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list syspass sudo dnf downgrade syspass-<VERSION_BEFORE_2.1.9> sudo dnf versionlock add syspass

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-2017-9306?

syspass: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-9306 being exploited?

CVE-2017-9306 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-2017-9306 affect?

CVE-2017-9306 affects syspass. Severity is medium (CVSS 6.1). inc/SP/Html/Html.class.php in sysPass 2.1.9 allows remote attackers to bypass the XSS filter, as demonstrated by use of an "<svg/onload=" substring instead of an "<svg onload=" substring.

How urgent is CVE-2017-9306?

Priority 42/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2025-25478 MEDIUM 6.5 UPGRADE The account file upload functionality in Syspass 3.2.x fails to properly handle special characters in filename
CVE-2025-25477 HIGH 8.1 UPGRADE A host header injection vulnerability in SysPass 3.2x allows an attacker to load malicious JS files from an ar
CVE-2025-25476 MEDIUM 5.4 UPGRADE A stored cross-site scripting (XSS) vulnerability in SysPass 3.2.x allows a malicious user with elevated privi
CVE-2024-42904 MEDIUM 6.1 UPGRADE A cross-site scripting (XSS) vulnerability in SysPass 3.2.x allows attackers to execute arbitrary web scripts
CVE-2022-4930 LOW 3.5 UPGRADE A vulnerability classified as problematic was found in nuxsmin sysPass up to 3.2.4

References

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