CVE-2019-1010199: ServiceStack ServiceStack Framework 4.5.14 is affected by: Cross Site Scripting (XSS)

Routine

MEDIUM 6.1DOWNGRADE

CVE-2019-1010199 is a medium-severity flaw (CVSS 6.1) affecting servicestack. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ServiceStack ServiceStack Framework 4.5.14 is affected by: Cross Site Scripting (XSS). The impact is: JavaScrpit is reflected in the server response, hence executed by the browser. The component is: the query used in the GET request is prone. The attack vector is: Since there is no server-side validation and If Browser encoding is bypassed, the victim is affected when opening a crafted URL. The fixed version is: 5.2.0.

Why this priority

No elevated risk signals yet

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 41%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-07-23
Last modified	2026-06-17

Publisher (CNA): DWF · Vendor: servicestack

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

Am I affected?

Timeline

2019-07-23 18:15 UTCPublished CVE record published
2026-06-17 02:09 UTCUpdated Record last modified

servicestack servicestack DOWNGRADE

Affected: 4.5.14

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.5.14

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.5.14 (Debian / Ubuntu)

apt-cache madison servicestack sudo apt install servicestack=<VERSION_BEFORE_4.5.14> sudo apt-mark hold servicestack

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

dnf --showduplicates list servicestack sudo dnf downgrade servicestack-<VERSION_BEFORE_4.5.14> sudo dnf versionlock add servicestack

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-2019-1010199?

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

Is CVE-2019-1010199 being exploited?

CVE-2019-1010199 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-2019-1010199 affect?

CVE-2019-1010199 affects servicestack. Severity is medium (CVSS 6.1). ServiceStack ServiceStack Framework 4.5.14 is affected by: Cross Site Scripting (XSS). The impact is: JavaScrpit is reflected in the server response, hence executed by the browser. The component is: the query used in the GET request is pron

How urgent is CVE-2019-1010199?

Priority 36/100. No elevated risk signals yet.

Related CVEs

CVE-2025-6445 HIGH 8.1 UPGRADE ServiceStack FindType Directory Traversal Remote Code Execution Vulnerability
CVE-2025-6444 MEDIUM 5.9 UPGRADE ServiceStack GetErrorResponse Improper Input Validation NTLM Relay Vulnerability

References

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