How severe is CVE-2018-1321?

CVE-2018-1321 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-1321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1321?

CVE-2018-1321 primarily affects Apache Syncope. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-1321?

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

When was CVE-2018-1321 published?

CVE-2018-1321 was published on 2018-03-20 and last updated on 2026-06-17.

CVE-2018-1321

CVE-2018-1321 is a high-severity vulnerability in Apache Syncope with a CVSS 3.x base score of 7.2. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 18% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apache Syncope
Published: 2018-03-20
Last modified: 2026-06-17

Description

An administrator with report and template entitlements in Apache Syncope 1.2.x before 1.2.11, 2.0.x before 2.0.8, and unsupported releases 1.0.x and 1.1.x which may be also affected, can use XSL Transformations (XSLT) to perform malicious operations, including but not limited to file read, file write, and code execution.

Frequently asked questions

What is CVE-2018-1321?: An administrator with report and template entitlements in Apache Syncope 1.2.x before 1.2.11, 2.0.x before 2.0.8, and unsupported releases 1.0.x and 1.1.x which may be also affected, can use XSL Transformations (XSLT) to perform malicious operations, including but not limited to file read, file write, and code execution.
How severe is CVE-2018-1321?: CVE-2018-1321 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-1321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1321?: CVE-2018-1321 primarily affects Apache Syncope. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-1321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-1321 published?: CVE-2018-1321 was published on 2018-03-20 and last updated on 2026-06-17.

References

Affected products (18)

cpe:2.3:a:apache:syncope:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.0.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.0.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.0.8:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.0.9:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.1.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.1.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.1.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.1.8:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:1.2.0:milestone1:*:*:*:*:*:*

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