CVE-2020-25912Network attack vector

Information disclosure via XML external entity expansion

Published Oct 31, 2021 · Updated Jul 9, 2026

XXE in Symphony 2.7.10 allows remote attackers to disclose information or interrupt service via crafted XML submitted to the parser. The convertFromXMLString function passes untrusted XML directly to DOMDocument::loadXML without disabling external entities, allowing entity expansion during parsing. Exploitation requires network access to a code path that accepts attacker-controlled XML; consequences are information disclosure or denial of service, with no integrity impact reported.

CVSS severity9.1
Critical
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in Symphony 2.7.10 allows remote attackers to disclose information or interrupt service via crafted XML submitted to the parser. The convertFromXMLString function passes untrusted XML directly to DOMDocument::loadXML without disabling external entities, allowing entity expansion during parsing. Exploitation requires network access to a code path that accepts attacker-controlled XML; consequences are information disclosure or denial of service, with no integrity impact reported.

The record

CVE
CVE-2020-25912
Published
Oct 31, 2021
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-611, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 31, 2021CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
6.4NVDAV:N/AC:L/Au:N/C:P/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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