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CVE-2021-23901

31
FAUCET Score

CVE-2021-23901 is a critical XML External Entity (XXE) injection vulnerability found in the Nutch DmozParser, affecting Apache Nutch versions prior to 1.18, as well as NetApp Nutch and Snap Creator Framework. This vulnerability allows an unauthenticated attacker to view server files and interact with backend systems. With a CVSS score of 9.1 (CRITICAL), it presents a high risk due to its network-based attack vector and low attack complexity, potentially leading to full confidentiality and integrity compromise. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community attention with 10 mentions, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.18CPE matchmatch criteria
cpe:2.3:a:apache:nutch:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:snap_creator_framework:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.36%
Probability of exploitation in next 30 days
EPSS Percentile
90.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0436 is in the 84th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: org.apache.nutch:nutchFixed in: 1.18

Vendor Advisories (1)

mavenGHSA-fxhp-wrw9-3r97critical

XML external entity (XXE) injection in Apache Nutch

Mar 18, 2022

References

issues.apache.org / jira/browse/NUTCH-2841
Issue TrackingPatchVendor Advisory
lists.apache.org / thread.html/r090321840b44cc91086c4e317bf2baffa270749dde6c1273b6567f7c%40%3Cdev.nutch.apache.org%3E
Mailing ListVendor Advisory
lists.apache.org / thread.html/r5e2f7737b42c73a3325f3c2c8cdee1ec27631b3a0e144104d84d70e6%40%3Cannounce.apache.org%3E
lists.apache.org / thread.html/r7ddfd680aa7ea001ca8da63bb23e3f8caa095a8b4f2261e46bade5c7%40%3Cdev.nutch.apache.org%3E
security.netapp.com / advisory/ntap-20210513-0003
Third Party Advisory