CVE-2026-48910Network attack vector

Browser data disclosure via Markdown parsing-error XSS

Published Jul 30, 2026 · Updated Jul 30, 2026

Cross-site scripting in Apache JSPWiki 2.12.3 and earlier allows remote attackers to read browser-session data via a crafted editing request. Apache identifies Markdown parsing-error processing as the locus but has not published the responsible function or exact error-output operation. A victim must render the affected error response in a browser, and the published impact is limited to information exposed through that session.

CVSS severity6.5
Medium
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

Cross-site scripting in Apache JSPWiki 2.12.3 and earlier allows remote attackers to read browser-session data via a crafted editing request. Apache identifies Markdown parsing-error processing as the locus but has not published the responsible function or exact error-output operation. A victim must render the affected error response in a browser, and the published impact is limited to information exposed through that session.

The record

CVE
CVE-2026-48910
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
The Apache Software Foundation
Product
Apache JSPWiki
Classifications
CWE-80, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 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=0 <=2.12.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache JSPWikiversion=0 <=2.12.3

Published CVSS scores

6.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1203Exploitation for Client Execution

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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