CVE-2023-26491Network attack vector

Browser JavaScript execution via reflected brief parameter

Published Mar 3, 2023 · Updated Feb 25, 2025

Cross-site scripting in DIYgod RSSHub before 1.0.0-master.c910c4d allows remote attackers to execute JavaScript via a crafted URL. The parameter middleware inserts an invalid brief query value into an HTML-formatted error message without neutralization, so the error page reflects attacker-controlled markup. Exploitation requires a user to visit the deliberately constructed URL and runs the injected script in that user's browser context, exposing browser-accessible data and actions.

CVSS severity6.1
Medium
EPSS probability0.43%
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 DIYgod RSSHub before 1.0.0-master.c910c4d allows remote attackers to execute JavaScript via a crafted URL. The parameter middleware inserts an invalid brief query value into an HTML-formatted error message without neutralization, so the error page reflects attacker-controlled markup. Exploitation requires a user to visit the deliberately constructed URL and runs the injected script in that user's browser context, exposing browser-accessible data and actions.

The record

CVE
CVE-2023-26491
Published
Mar 3, 2023
Updated
Feb 25, 2025
Vendor
DIYgod
Product
RSSHub
Classifications
CWE-79, T1203, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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=< 1.0.0-master.c910c4d

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DIYgod · RSSHubversion=< 1.0.0-master.c910c4d

Published CVSS scores

5.4GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

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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