How severe is CVE-2019-17557?

CVE-2019-17557 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-17557 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-17557?

CVE-2019-17557 affects Apache Syncope. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-17557?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-17557 published?

CVE-2019-17557 was published on 2020-05-04 and last updated on 2026-06-17.

CVE-2019-17557

CVE-2019-17557 is a medium-severity vulnerability in Apache Syncope with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Apache Syncope
Published: 2020-05-04
Last modified: 2026-06-17

Description

It was found that the Apache Syncope EndUser UI login page prio to 2.0.15 and 2.1.6 reflects the successMessage parameters. By this mean, a user accessing the Enduser UI could execute javascript code from URL query string.

Frequently asked questions

What is CVE-2019-17557?: It was found that the Apache Syncope EndUser UI login page prio to 2.0.15 and 2.1.6 reflects the successMessage parameters. By this mean, a user accessing the Enduser UI could execute javascript code from URL query string.
How severe is CVE-2019-17557?: CVE-2019-17557 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-17557 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-17557?: CVE-2019-17557 affects Apache Syncope. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-17557?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-17557 published?: CVE-2019-17557 was published on 2020-05-04 and last updated on 2026-06-17.

References

http://syncope.apache.org/security

Affected products (1)

cpe:2.3:a:apache:syncope:*:*:*:*:*:*:*:*

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