What is CVE-2020-8952?

CVE-2020-8952 is a medium-severity vulnerability in Fiserv Accurate Reconciliation, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-02-26.

How severe is CVE-2020-8952?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Fiserv Accurate Reconciliation

CVE-2020-8952

Fiserv Accurate Reconciliation 2.19.0, fixed in 3.0.0 or higher, allows XSS via the logout.jsp timeOut parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-02-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Fiserv Accurate Reconciliation

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/eSecure-CVEs/CVEs/blob/master/CVE-2020-8952 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-8952?: CVE-2020-8952 is a medium-severity vulnerability in Fiserv Accurate Reconciliation, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-02-26.
How severe is CVE-2020-8952?: Medium severity. CVSS v3 base score is 6.1 out of 10.