XML2Dict XML Entity Expansion Vulnerability

published 2021-06-30 5 y ago modified 2026-06-17 4 mo ago also GHSA-gp6m-vqhm-5cm5 , PYSEC-2021-349 , EUVD-2021-0469

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits: 0; none known

XXE vulnerability in 'XML2Dict' version 0.2.2 allows an attacker to cause a denial of service.

Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

whitesourcesoftware.com https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25951 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
pypi	xml2dict	<=0.2.2 all versions	no fix listed

Affected products

n/a XML2Dict

Classification

Weakness

CWE-611 Improper Restriction of XML External Entity Reference
CWE-776 Improper Restriction of Recursive Entity References in DTDs

References

whitesourcesoftware.com /vulnerability-database/CVE-2021-25951
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-25951
advisory
github.com /mcspring/XML2Dict/tree/master
web
github.com /mcspring/xml2dict
package
github.com /pypa/advisory-database/tree/main/vulns/xml2dict/PYSEC-2021-349.yaml
web
pypi.org /project/XML2Dict
web
github.com /advisories/GHSA-gp6m-vqhm-5cm5
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary