How severe is CVE-2020-8951?

CVE-2020-8951 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-8951 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8951?

CVE-2020-8951 affects Fiserv Accurate Reconciliation. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8951?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-8951 published?

CVE-2020-8951 was published on 2020-02-26 and last updated on 2026-06-17.

CVE-2020-8951

CVE-2020-8951 is a medium-severity vulnerability in Fiserv Accurate Reconciliation with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fiserv Accurate Reconciliation
Published: 2020-02-26
Last modified: 2026-06-17

Description

Fiserv Accurate Reconciliation 2.19.0, fixed in 3.0.0 or higher, allows XSS via the Source or Destination field of the Configuration Manager (Configuration Parameter Translation) page.

Frequently asked questions

What is CVE-2020-8951?: Fiserv Accurate Reconciliation 2.19.0, fixed in 3.0.0 or higher, allows XSS via the Source or Destination field of the Configuration Manager (Configuration Parameter Translation) page.
How severe is CVE-2020-8951?: CVE-2020-8951 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-8951 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8951?: CVE-2020-8951 affects Fiserv Accurate Reconciliation. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8951?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-8951 published?: CVE-2020-8951 was published on 2020-02-26 and last updated on 2026-06-17.

References

https://github.com/eSecure-CVEs/CVEs/blob/master/CVE-2020-8951

Affected products (1)

cpe:2.3:a:fiserv:accurate_reconciliation:2.19.0:*:*:*:*:*:*:*

More vulnerabilities in Fiserv Accurate Reconciliation

CVE-2020-8952 — Medium (CVSS 6.1): Fiserv Accurate Reconciliation 2.19.0, fixed in 3.0.0 or higher, allows XSS via the logout.jsp timeOut parameter.

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