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CVE-2026-126778VulnerabilityPublished

Wallos 4.4.0 before 5.10.3 contains a stored cross-site scripting vulnerability in

Source GCVE Database

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Authoritative record:CVE-2026-126778· Medium 5.1

Not known to be exploited · CVSS 5.1 Medium : upgrade to 5.10.3 when convenient.

Data as of 11 Nov 2026, 22:33 UTC

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.05.1
CNA (VulnCheck)CVSS 3.15.4
Patch
Available – fixed in 5.10.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade Wallos to 5.10.3.

Affected software

ProductAffectedFixed in
elliteWallosAffected
  • >=4.4.0 <5.10.3
Fixed in
  • 5.10.3
GitHubWallospkg:github/WallosOther threatsAffected
  • >=4.4.0 <5.10.3
Fixed in
  • 5.10.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in Wallos version 5.10.3 and later. Users should upgrade to version 5.10.3 or newer to remediate this vulnerability. No vendor advisory or patch links were provided, so verify with the vendor for official patch availability and deployment instructions. Until patched, restrict access to the sendnotifications.php endpoint to trusted users only and monitor for suspicious activity related to notification services.

Description

Wallos versions from 4.4.0 up to but not including 5.10.3 contain a stored cross-site scripting (XSS) vulnerability in the sendnotifications.php endpoint. This flaw allows registered users to inject malicious scripts through unescaped notification service responses. An attacker can exploit this by directing Mattermost webhook URLs or Web Push endpoints to a server under their control that returns JavaScript. When an administrator opens sendnotifications.php, the injected script executes in their session, potentially compromising confidentiality and integrity.

References

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