CVE-2026-50980Public exploitNetwork attack vector

Session hijacking via unencoded DNS TXT responses

Published Aug 28, 2026 · Updated Aug 28, 2026

Stored XSS in oPanel's DNS lookup and management component before 1.20.25 allows remote attackers to hijack sessions via crafted TXT records. The panel renders DNS responses from an attacker-controlled nameserver into its web interface without adequate HTML encoding, causing a malicious TXT payload to execute as JavaScript. Execution requires an authenticated user, such as an administrator, to view the returned DNS data; the public proof of concept exfiltrates accessible cookies to seize that browser session.

CVSS severityUnavailable
Unscored
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in oPanel's DNS lookup and management component before 1.20.25 allows remote attackers to hijack sessions via crafted TXT records. The panel renders DNS responses from an attacker-controlled nameserver into its web interface without adequate HTML encoding, causing a malicious TXT payload to execute as JavaScript. Execution requires an authenticated user, such as an administrator, to view the returned DNS data; the public proof of concept exfiltrates accessible cookies to seize that browser session.

The record

CVE
CVE-2026-50980
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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

No CVSS assessment is available in this record.

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 exploitPublished

Weakness, pattern, technique

T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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