CVE-2022-25236

CVE-2022-25236 is a critical-severity vulnerability in Libexpat Project Libexpat with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 34% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-668.

Key facts

Description

xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs.

Frequently asked questions

What is CVE-2022-25236?
xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs.
How severe is CVE-2022-25236?
CVE-2022-25236 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-25236 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 34% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-25236?
CVE-2022-25236 primarily affects Libexpat Project Libexpat. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-25236?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-25236 published?
CVE-2022-25236 was published on 2022-02-16 and last updated on 2026-06-17.

References

Affected products (7)

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