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HIGH severity

CVE-2018-1321 — syncope-core

HIGHFix: apache/syncope@726231f

CVE-2018-1321 is a high-severity (CVSS 7.2) Improper Input Validation vulnerability in org.apache.syncope:syncope-core. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for org.apache.syncope:syncope-core — see the affected versions and patch details below.

High severity vulnerability that affects org.apache.syncope:syncope-core

Also known asGHSA-xgc9-9w4v-h33h
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
1 known
Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
17.5%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs97th percentile — riskier than 97% of all scored CVEsHighest risk
2.90%9.11%15.3%21.5%6.4%17.5%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
☕org.apache.syncope:syncope-core☕org.apache.syncope:syncope-core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.apache.syncope:syncope-coreall versions1.2.11org.apache.syncope:syncope-core:1.2.11
☕Mavenorg.apache.syncope:syncope-core≥ 2.0.0&&< 2.0.82.0.8org.apache.syncope:syncope-core:2.0.8

Affected Products

1 product · 19 configurations
Application
syncopeapache
≥ 2.0.0 && < 2.0.8
17 versions
1.0.01.0.41.0.51.0.61.0.71.0.81.0.91.1.01.1.11.1.21.1.31.1.4
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-45400webappswindows

Apache Syncope 2.0.7 - Remote Code Execution

by Che-Chun Kuo · Sep 13, 2018

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.syncope:syncope-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.apache.syncope:syncope-core to 1.2.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-1321 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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CVE-2018-1321: syncope-core — Fixed in 1.2.11