What is the CVSS score of CVE-2020-4731?

CVE-2020-4731 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.7%.

Is there a patch available for CVE-2020-4731?

Yes, a patch is available for CVE-2020-4731. Update the affected software to the latest version immediately.

Aspera Shares CVE-2020-4731

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2020-09-21 psirt@us.ibm.com

XSS IBM Aspera Shares

6.1

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-79 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Output encoding, context-aware escaping MITRE ATT&CK 2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required.
Exploit ScenarioDerived	A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.7% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

IBM Aspera Web Application 1.9.14 PL1 is vulnerable to cross-site scripting. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. IBM Aspera Web Application 1.9.14 PL1 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 188055. Affected products include: Ibm Aspera Shares.

Know when Aspera Shares gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

DescriptionNVD

IBM Aspera Web Application 1.9.14 PL1 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 188055.

Threat Intelligence Overview

EPSS Score

0.7%

Top 50% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.7%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +30

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Cross-Site Scripting MEDIUM

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Affected Products (CPE)NVD

cpe:2.3:a:ibm:aspera_shares:*:*:*:*:*:*:*:*

More in Aspera Shares

View all

CVE-2025-13916 HIGH This Week

7.5 Apr 01

IBM Aspera Shares versions 1.9.9 through 1.11.0 rely on weaker-than-expected cryptographic algorithms when protecting se

CVE-2025-0162 HIGH This Week

7.1 Mar 07

IBM Aspera Shares 1.9.9 through 1.10.0 PL7 is vulnerable to an XML external entity injection (XXE) attack when processin

CVE-2025-66487 MEDIUM This Month

6.5 Apr 01

IBM Aspera Shares 1.9.9 through 1.11.0 lacks proper rate limiting on authenticated user email submissions, allowing high

CVE-2025-66483 MEDIUM This Month

6.5 Apr 01

IBM Aspera Shares versions 1.9.9 through 1.11.0 fail to invalidate user sessions following password reset operations, en

CVE-2024-38315 MEDIUM This Month

6.5 Sep 16

IBM Aspera Shares 1.0 through 1.10.0 PL3 does not invalidate session after a password reset which could allow an authent

CVE-2024-56472 MEDIUM This Month

6.4 Feb 05

IBM Aspera Shares 1.9.0 through 1.10.0 PL6 is vulnerable to stored cross-site scripting. Rated medium severity (CVSS 6.4

CVE-2025-66486 MEDIUM This Month

6.1 Apr 01

HTML injection in IBM Aspera Shares 1.9.9 through 1.11.0 allows authenticated remote attackers with high privileges to i

CVE-2024-56471 MEDIUM This Month

5.4 Feb 05

IBM Aspera Shares 1.9.0 through 1.10.0 PL6 is vulnerable to server-side request forgery (SSRF). Rated medium severity (C

CVE-2024-56470 MEDIUM This Month

5.4 Feb 05

IBM Aspera Shares 1.9.0 through 1.10.0 PL6 is vulnerable to server-side request forgery (SSRF). Rated medium severity (C

CVE-2025-66485 MEDIUM This Month

5.4 Apr 01

HTTP header injection in IBM Aspera Shares 1.9.9 through 1.11.0 allows authenticated attackers to conduct cross-site scr

CVE-2025-66484 MEDIUM This Month

5.4 Apr 01

Stored cross-site scripting in IBM Aspera Shares 1.9.9 through 1.11.0 allows authenticated high-privilege users to injec

CVE-2024-56473 MEDIUM This Month

5.3 Feb 05

IBM Aspera Shares 1.9.0 through 1.10.0 PL6 could allow an attacker to spoof their IP address, which is written to log fi

Same weakness CWE-79 – Cross-site Scripting (XSS)

View all

CVE-2020-3580 MEDIUM POC

6.1

CVE-2013-7389 MEDIUM POC

4.3

CVE-2021-25299 MEDIUM POC

6.1

CVE-2014-2120 MEDIUM

6.1

CVE-2023-40000 HIGH POC

8.3

CVE-2016-8581 MEDIUM POC

6.1

CVE-2013-5223 MEDIUM POC

5.4

CVE-2025-52367 MEDIUM POC

5.4

Same technique XSS

View all

CVE-2017-9248 CRITICAL POC

9.8

CVE-2013-1710 CRITICAL POC

10.0

CVE-2024-52875 HIGH POC

8.8

References

Advisories & patches

PATCH https://www.ibm.com/support/pages/node/6326929 ADVISORY https://exchange.xforce.ibmcloud.com/vulnerabilities/188055

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back