CVE-2020-8952Network attack vector

Browser script execution via logout timeout parameter

Published Feb 26, 2020 · Updated Aug 4, 2024

Cross-site scripting in Fiserv Accurate Reconciliation 2.19.0 allows remote attackers to execute script in a user's browser via logout.jsp timeOut. The vulnerable logout.jsp timeOut parameter accepts attacker-controlled content that is rendered as executable browser script. Exploitation requires a victim to request a crafted URL; the issue can read or alter data available to that browser session but does not directly execute server code.

CVSS severity6.1
Medium
EPSS probability0.73%
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 Fiserv Accurate Reconciliation 2.19.0 allows remote attackers to execute script in a user's browser via logout.jsp timeOut. The vulnerable logout.jsp timeOut parameter accepts attacker-controlled content that is rendered as executable browser script. Exploitation requires a victim to request a crafted URL; the issue can read or alter data available to that browser session but does not directly execute server code.

The record

CVE
CVE-2020-8952
Published
Feb 26, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2020CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/C:N/I:P/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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