How severe is CVE-2021-28110?

CVE-2021-28110 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-28110 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28110?

CVE-2021-28110 affects Compassplus Tranzware E-commerce Payment Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28110?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-28110 published?

CVE-2021-28110 was published on 2021-03-19 and last updated on 2026-06-17.

CVE-2021-28110

CVE-2021-28110 is a high-severity vulnerability in Compassplus Tranzware E-commerce Payment Gateway with a CVSS 3.x base score of 7.5. 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-611.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Compassplus Tranzware E-commerce Payment Gateway
Published: 2021-03-19
Last modified: 2026-06-17

Description

/exec in TranzWare e-Commerce Payment Gateway (TWEC PG) before 3.1.27.5 had a vulnerability in its XML parser.

Frequently asked questions

What is CVE-2021-28110?: /exec in TranzWare e-Commerce Payment Gateway (TWEC PG) before 3.1.27.5 had a vulnerability in its XML parser.
How severe is CVE-2021-28110?: CVE-2021-28110 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-28110 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28110?: CVE-2021-28110 affects Compassplus Tranzware E-commerce Payment Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28110?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-28110 published?: CVE-2021-28110 was published on 2021-03-19 and last updated on 2026-06-17.

References

https://gist.github.com/kukuxumushi/0b7d90a917ac3480066c4cbf7519b40a

Affected products (1)

cpe:2.3:a:compassplus:tranzware_e-commerce_payment_gateway:*:*:*:*:*:*:*:*

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