7.5
HIGH
CVE-2021-27777
Apache XML XXE Injection Vulnerability
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.

INFO

Published Date :

May 12, 2022, 10:15 p.m.

Last Modified :

Aug. 6, 2022, 3:18 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-27777 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Hcltech unica
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-27777.

URL Resource
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097124 Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-27777 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-27777 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Aug. 06, 2022

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    May. 25, 2022

    Action Type Old Value New Value
    Removed CWE HCL Software CWE-611
    Added CWE HCL Software CWE-91
  • Initial Analysis by [email protected]

    May. 24, 2022

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
    Changed Reference Type https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097124 No Types Assigned https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097124 Vendor Advisory
    Added CWE NIST CWE-611
    Added CPE Configuration OR *cpe:2.3:a:hcltech:unica:*:*:*:*:*:*:*:* versions up to (excluding) 12.1.1
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-27777 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-27777 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.07 }} 0.00%

score

0.30418

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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Scope
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