A stored cross-site scripting (XSS) vulnerability in alkacon-OpenCMS v11.0.0.0 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Title field under the Upload Image module.
https://github.com/alkacon/opencms-core/issues/652
https://github.com/alkacon/opencms-core/commit/21bfbeaf6b038e2c03bb421ce7f0933dd7a7633e