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Not in CISA KEV
HIGH severity

CVE-2025-24853 — jspwiki-main

HIGHFix: apache/jspwiki#376

CVE-2025-24853 is a high-severity (CVSS 7.5) Cross-site Scripting (XSS) vulnerability in org.apache.jspwiki:jspwiki-main. A fix is available for org.apache.jspwiki:jspwiki-main — see the affected versions and patch details below.

Apache JSPWiki: Cross-Site Scripting (XSS) in JSPWiki Header Link processing

Also known asGHSA-rrff-chj9-w4c7
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-24853.

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk
0.00%0.57%1.13%1.70%0.3%0.6%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
☕org.apache.jspwiki:jspwiki-main☕org.apache.jspwiki:jspwiki-markdown

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

A carefully crafted request when creating a header link using the wiki markup syntax, which could allow the attacker to execute javascript in the victim's browser and get some sensitive information about the victim.

Further research by the JSPWiki team showed that the markdown parser allowed this kind of attack too.

Apache JSPWiki users should upgrade to 2.12.3 or later.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.apache.jspwiki:jspwiki-mainall versions2.12.3org.apache.jspwiki:jspwiki-main:2.12.3
☕Mavenorg.apache.jspwiki:jspwiki-markdownall versions2.12.3org.apache.jspwiki:jspwiki-markdown:2.12.3

Affected Products

1 product · 1 configurations
Application
jspwikiapache
< 2.12.3
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.jspwiki:jspwiki-main, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.apache.jspwiki:jspwiki-main to 2.12.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-24853 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

A carefully crafted request when creating a header link using the wiki markup syntax, which could allow the attacker to execute javascript in the victim's browser and get some sensitive information about the victim. Further research by the JSPWiki team showed that the markdown parser allowed this kind of attack too. Apache JSPWiki users should upgrade to 2.12.3 or later.
O3 Security · Impact-Aware SCA

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CVE-2025-24853: jspwiki-main — Fixed in 2.12.3