How severe is CVE-2019-15557?

CVE-2019-15557 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-15557 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-15557?

CVE-2019-15557 affects Xm-online Xm^online 2 User Account And Authentication Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-15557?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-15557 published?

CVE-2019-15557 was published on 2019-08-26 and last updated on 2026-06-17.

CVE-2019-15557

CVE-2019-15557 is a critical-severity vulnerability in Xm-online Xm^online 2 User Account And Authentication Server with a CVSS 3.x base score of 9.8. 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-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Xm-online Xm^online 2 User Account And Authentication Server
Published: 2019-08-26
Last modified: 2026-06-17

Description

XM^online 2 User Account and Authentication server 1.0.0 allows SQL injection via a tenant key.

Frequently asked questions

What is CVE-2019-15557?: XM^online 2 User Account and Authentication server 1.0.0 allows SQL injection via a tenant key.
How severe is CVE-2019-15557?: CVE-2019-15557 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-15557 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-15557?: CVE-2019-15557 affects Xm-online Xm^online 2 User Account And Authentication Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-15557?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-15557 published?: CVE-2019-15557 was published on 2019-08-26 and last updated on 2026-06-17.

References

https://github.com/xm-online/xm-uaa/pull/61

Affected products (1)

cpe:2.3:a:xm-online:xm\^online_2_user_account_and_authentication_server:1.0.0:*:*:*:*:*:*:*

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