How severe is CVE-2020-27974?

CVE-2020-27974 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-27974 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27974?

CVE-2020-27974 affects Quadient Mail Accounting. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27974?

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

When was CVE-2020-27974 published?

CVE-2020-27974 was published on 2020-10-28 and last updated on 2026-06-17.

CVE-2020-27974

CVE-2020-27974 is a medium-severity vulnerability in Quadient Mail Accounting with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Quadient Mail Accounting
Published: 2020-10-28
Last modified: 2026-06-17

Description

NeoPost Mail Accounting Software Pro 5.0.6 allows php/Commun/FUS_SCM_BlockStart.php?code= XSS.

Frequently asked questions

What is CVE-2020-27974?: NeoPost Mail Accounting Software Pro 5.0.6 allows php/Commun/FUS_SCM_BlockStart.php?code= XSS.
How severe is CVE-2020-27974?: CVE-2020-27974 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-27974 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27974?: CVE-2020-27974 affects Quadient Mail Accounting. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27974?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-27974 published?: CVE-2020-27974 was published on 2020-10-28 and last updated on 2026-06-17.

References

https://herolab.usd.de/security-advisories/usd-2020-0029/

Affected products (1)

cpe:2.3:a:quadient:mail_accounting:5.0.6:*:*:*:pro:*:*:*

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

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →