CVE-2021-44478Network attack vector

Sensitive-data theft via crafted administrator link

Published Mar 8, 2022 · Updated Aug 4, 2024

Cross-site scripting in Siemens Polarion ALM before V21 R2 P2 and WebClient for SVN allows remote attackers to extract sensitive data. The SVN WebClient places insufficiently neutralized data from a crafted link into a web page, causing script execution in an administrator's browser session. Exploitation requires an administrator to open the link; the resulting script can access sensitive information available to that session.

CVSS severity6.5
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Siemens Polarion ALM before V21 R2 P2 and WebClient for SVN allows remote attackers to extract sensitive data. The SVN WebClient places insufficiently neutralized data from a crafted link into a web page, causing script execution in an administrator's browser session. Exploitation requires an administrator to open the link; the resulting script can access sensitive information available to that session.

The record

CVE
CVE-2021-44478
Published
Mar 8, 2022
Updated
Aug 4, 2024
Vendor
Siemens
Product
Polarion WebClient for SVN
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · Polarion WebClient for SVNversion=All versions
Siemens · Polarion ALMversion=All versions < V21 R2 P2

Published CVSS scores

6.5Siemens ProductCERTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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