CVE-2026-57940Network attack vector

Administrative SSRF via unvalidated RSS feed URL

Published Jun 26, 2026 · Updated Jun 26, 2026

SSRF in the RSS feed importer in DanPros HTMLy 3.1.1 allows remote authenticated users to make the server request a chosen URL. The get_feed() function in system/admin/admin.php passes the user-controlled $feed_url directly to file_get_contents() without destination or scheme validation. Administrative access to Tools > Import RSS is required; crafted URLs can target attacker-controlled hosts, internal services, cloud metadata, or local files.

CVSS severity2.1
Low
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in the RSS feed importer in DanPros HTMLy 3.1.1 allows remote authenticated users to make the server request a chosen URL. The get_feed() function in system/admin/admin.php passes the user-controlled $feed_url directly to file_get_contents() without destination or scheme validation. Administrative access to Tools > Import RSS is required; crafted URLs can target attacker-controlled hosts, internal services, cloud metadata, or local files.

The record

CVE
CVE-2026-57940
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
Danang Probo Sayekti
Product
HTMLy
Classifications
CWE-918
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Danang Probo Sayekti · HTMLyversion=3.1.1

Published CVSS scores

2.1MITRECVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

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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