Security readout for executives and security teams
Plain-English summary
Acronis Cyber Protect 15 had cross-site scripting in notification pop-ups before build 28035. If a vulnerable system displayed malicious content in a notification, browser-side code could run in the user's session. The sources do not provide CVSS scoring or detailed attack prerequisites.
Executive priority
Address during the next security maintenance window, sooner for administrator-facing or broadly reachable consoles. The issue affects a security management product, but available sources do not show active exploitation or provide high-severity scoring.
Technical view
CVE-2021-44201 is a CWE-79 XSS issue in notification pop-ups. The affected product is Acronis Cyber Protect 15 on Windows and Linux before build 28035. The provided sources identify the affected version boundary but do not describe the vulnerable code path, privileges required, or patch internals.
Likely exposure
Exposure is limited to organizations running Acronis Cyber Protect 15 Windows or Linux builds earlier than 28035. Internet exposure is not stated in the sources; prioritize management servers and consoles reachable by administrators or delegated operators.
Exploitation context
The source bundle does not report active exploitation, and the CVE is not listed as KEV. Public details are sparse, so treat exploitation status and required attacker position as unconfirmed unless Acronis or another cited source states otherwise.
Researcher notes
Evidence is limited to the CVE record and Acronis advisory reference. Do not assume affected versions beyond Acronis Cyber Protect 15 before build 28035. Useful follow-up would be vendor confirmation of prerequisites, impacted roles, and whether cloud-managed deployments were affected.
Mitigation direction
- Upgrade Acronis Cyber Protect 15 to build 28035 or later.
- Confirm both Windows and Linux deployments are covered.
- Check Acronis SEC-3167 for any environment-specific guidance.
- Restrict access to Acronis management interfaces to trusted users and networks.
- Monitor vendor advisories for updated severity or remediation details.
Validation and detection
- Inventory all Acronis Cyber Protect 15 installations and record build numbers.
- Verify every deployment is build 28035 or later.
- Review who can create or influence notification content.
- Check administrative logs for unexpected notification content or suspicious UI activity.
- Use approved non-executing XSS validation after remediation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-44201 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://security-advisory.acronis.com/advisories/SEC-3167CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.