How severe is CVE-2021-41559?

CVE-2021-41559 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-41559 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-2021-41559?

CVE-2021-41559 affects Silverstripe. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41559?

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

When was CVE-2021-41559 published?

CVE-2021-41559 was published on 2022-06-28 and last updated on 2026-06-17.

CVE-2021-41559

CVE-2021-41559 is a medium-severity vulnerability in Silverstripe with a CVSS 3.x base score of 6.5. 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-776.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-776
Affected product: Silverstripe
Published: 2022-06-28
Last modified: 2026-06-17

Description

Silverstripe silverstripe/framework 4.8.1 has a quadratic blowup in Convert::xml2array() that enables a remote attack via a crafted XML document.

Frequently asked questions

What is CVE-2021-41559?: Silverstripe silverstripe/framework 4.8.1 has a quadratic blowup in Convert::xml2array() that enables a remote attack via a crafted XML document.
How severe is CVE-2021-41559?: CVE-2021-41559 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-41559 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-2021-41559?: CVE-2021-41559 affects Silverstripe. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41559?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41559 published?: CVE-2021-41559 was published on 2022-06-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:silverstripe:silverstripe:*:*:*:*:*:*:*:*

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