CVE-2023-25827Network attack vector

Browser script execution via unescaped error parameters

Published May 3, 2023 · Updated Feb 12, 2025

Reflected XSS in OpenTSDB 2.4.1 and earlier allows remote attackers to execute JavaScript in a targeted user's browser via crafted HTTP parameters. Legacy HTTP query and logging error handlers insert user-supplied parameter values into hard-coded HTML error responses without escaping them. Exploitation requires a targeted user to open a crafted request, after which script runs in that user's browser context and can read or alter accessible page data.

CVSS severity8.2
High
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in OpenTSDB 2.4.1 and earlier allows remote attackers to execute JavaScript in a targeted user's browser via crafted HTTP parameters. Legacy HTTP query and logging error handlers insert user-supplied parameter values into hard-coded HTML error responses without escaping them. Exploitation requires a targeted user to open a crafted request, after which script runs in that user's browser context and can read or alter accessible page data.

The record

CVE
CVE-2023-25827
Published
May 3, 2023
Updated
Feb 12, 2025
Vendor
OpenTSDB
Product
OpenTSDB
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 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=0 <=2.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenTSDB · OpenTSDBversion=0 <=2.4.1

Published CVSS scores

8.2SynopsysCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
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 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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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