Strix
26.1K

CVE-2021-27777

HIGHCVSS 7.5/10EPSS 0.77%

Last modified

CVE-2021-27777 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. XML External Entity (XXE) injection vulnerabilities occur when poorly configured XML parsers process user supplied input without sufficient validation. Attackers can exploit this vulnerability to manipulate XML content and inject malicious external entity references.. EPSS estimates a 0.77% chance of exploitation in the next 30 days.

Description

XML External Entity (XXE) injection vulnerabilities occur when poorly configured XML parsers process user supplied input without sufficient validation. Attackers can exploit this vulnerability to manipulate XML content and inject malicious external entity references.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability
0.77%

51.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
HcltechUnica< 12.1.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-27777?
XML External Entity (XXE) injection vulnerabilities occur when poorly configured XML parsers process user supplied input without sufficient validation. Attackers can exploit this vulnerability to manipulate XML content and inject malicious external entity references.
How severe is CVE-2021-27777?
CVE-2021-27777 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.77% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27777?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27777?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST