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CVE-2026-101111MediumCVSS 5.3CVE published 28 September 2026Added to mySites.guru 28 September 2026

Book Library (com_booklibrary) below 6.4.6 - Reflected Cross-Site Scripting

Book Library by OrdaSoft before 6.4.6 echoes the raw title request parameter into a double-quoted HTML attribute on the public book page (site/views/view_book/tmpl/default.php) with no escaping, so a crafted link runs script in the browser of whoever opens it. CVE-2026-101111, CVSS 4.0 5.3 Medium. Update to the newest release OrdaSoft offers.

Is my site affected?

Affected
Book Library before 6.4.6
Fixed in
6.4.6
What to do
Update Book Library to 6.4.6 or later.
Check whether your sites are affected

How CVE-2026-101111 is scored

The base metrics as Joomla CNA published them, and what each one means for a site running an affected version. Threat and environmental metrics are left out: they describe a moment or a particular install rather than the flaw.

5.3 Medium

CVSS 4.0, scored by Joomla CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

How it is reached

AV:N Attack vector
Network. Reachable across the internet
AC:L Attack complexity
Low. Nothing to work around, it just works
AT:N Attack requirements
None. Works against any affected install
PR:N Privileges required
None. No account needed
UI:P User interaction
Passive. Someone has to visit a page

What it does to the site

VC:L Confidentiality
Low. Some data can be read
VI:L Integrity
Low. Some data can be altered
VA:L Availability
Low. The site slows or stutters

What it does beyond the site

SC:N Confidentiality
None. Other systems keep their data
SI:N Integrity
None. Other systems keep their integrity
SA:N Availability
None. Other systems stay up

Timeline

  1. 28 September 2026CVE-2026-101111 record published by its CNA
  2. 28 September 2026mySites.guru check added for Book Library (before 6.4.6)
  3. 28 September 2026We published: Three OrdaSoft Joomla Extensions Have Unauthenticated SQL Injections in Their Sort Order

Rule details

Our disclosure post

Three OrdaSoft Joomla Extensions Have Unauthenticated SQL Injections in Their Sort Order

Three OrdaSoft Joomla Extensions Have Unauthenticated SQL Injections in Their Sort Order

Real Estate Manager, Vehicle Manager and Book Library for Joomla each have an SQL injection needing no login and a reflected XSS. Six CVEs and their fixes.

Other vulnerabilities in Book Library

Updating for CVE-2026-101111 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension.

Book Library

Latest safe version: 6.4.6

References

CVE-2026-101111 questions

Which versions are affected by CVE-2026-101111?
CVE-2026-101111 affects Book Library before 6.4.6. The fix is in 6.4.6.
How do I fix CVE-2026-101111?
Update Book Library to 6.4.6 or later. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
How severe is CVE-2026-101111?
Joomla CNA scores it 5.3 (Medium) under CVSS 4.0. In plain terms: reachable across the internet, no account needed and someone has to visit a page.

Running an affected version on a site you manage?

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This check is part of the mySites.guru Joomla vulnerability scanner, which reads every installed extension's version on each audit. Browse the rest of the Joomla vulnerability database.

Rules current as of 20 October 2026.