CVE-2021-28803 is a vulnerability in QNAP Qcenter
Published on July 1, 2021
Stored XSS Vulnerability in Q'center
This issue affects: QNAP Systems Inc. Q'center versions prior to 1.11.1004.
Weakness Type
What is a Basic XSS Vulnerability?
The software receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. This may allow such characters to be treated as control characters, which are executed client-side in the context of the user's session. Although this can be classified as an injection problem, the more pertinent issue is the improper conversion of such special characters to respective context-appropriate entities before displaying them to the user.
CVE-2021-28803 has been classified to as a Basic XSS vulnerability or weakness.
Products Associated with CVE-2021-28803
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Affected Versions
QNAP Systems Inc. Q'center:- Version unspecified and below 1.11.1004 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.