What is CVE-2021-41559?

CVE-2021-41559 is a medium-severity vulnerability in Silverstripe, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 6.5/10. Published 2022-06-28.

How severe is CVE-2021-41559?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XXE in Silverstripe

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.

EPSS: 0.010 (59.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Silverstripe
N/a — versions n/a

Weakness classification (CWE)

CWE-776 — Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion)

References

cve@mitre.org (x_refsource_MISC, Not Applicable, Vendor Advisory)
cve@mitre.org (x_refsource_MISC, Release Notes, Vendor Advisory)
cve@mitre.org (x_refsource_MISC, Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-41559?: CVE-2021-41559 is a medium-severity vulnerability in Silverstripe, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 6.5/10. Published 2022-06-28.
How severe is CVE-2021-41559?: Medium severity. CVSS v3 base score is 6.5 out of 10.