CVE-2025-59948Public exploitNetwork attack vector

Account takeover via unsandboxed feed event handlers

Published Sep 29, 2025 · Updated Sep 29, 2025

Cross-site scripting in FreshRSS before 1.27.0 allows remote authenticated users to take over accounts through crafted feed content. Feed sanitization leaves certain HTML event-handler attributes intact, while api/query.php renders the resulting entries without a Content Security Policy that blocks script execution. Exploitation requires administrator-enabled API access and a victim to load the query output; an administrator victim exposes administrative actions.

CVSS severity6.7
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in FreshRSS before 1.27.0 allows remote authenticated users to take over accounts through crafted feed content. Feed sanitization leaves certain HTML event-handler attributes intact, while api/query.php renders the resulting entries without a Content Security Policy that blocks script execution. Exploitation requires administrator-enabled API access and a victim to load the query output; an administrator victim exposes administrative actions.

The record

CVE
CVE-2025-59948
Published
Sep 29, 2025
Updated
Sep 29, 2025
Vendor
FreshRSS
Product
FreshRSS
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2025Record 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=< 1.27.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FreshRSS · FreshRSSversion=< 1.27.0

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.7GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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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