CVE-2023-26261: In UBIKA WAAP Gateway/Cloud through 6.10, a blind XPath injection leads to an authentication bypass by stealin

Q: How do I fix CVE-2023-26261?

waap cloud: upgrade to 6.5.6, 6.11.0; waap gateway: upgrade to 6.5.6, 6.11.0. Exact commands for each OS are on this page.

Q: Is CVE-2023-26261 being exploited?

CVE-2023-26261 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-26261 affect?

CVE-2023-26261 affects waap cloud, waap gateway. Severity is critical (CVSS 9.8). In UBIKA WAAP Gateway/Cloud through 6.10, a blind XPath injection leads to an authentication bypass by stealing the session of another connected user. The fixed versions are WAAP Gateway & Cloud 6.11.0 and 6.5.6-patch15.

Q: How urgent is CVE-2023-26261?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADEUPGRADE

CVE-2023-26261 is a critical-severity flaw (CVSS 9.8) affecting waap cloud, waap gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In UBIKA WAAP Gateway/Cloud through 6.10, a blind XPath injection leads to an authentication bypass by stealing the session of another connected user. The fixed versions are WAAP Gateway & Cloud 6.11.0 and 6.5.6-patch15.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 42%)
CISA exploited list	No
Weakness	CWE-74
Published	2023-03-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ubikasec

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-03-08 15:15 UTCPublished CVE record published
2026-06-17 05:42 UTCUpdated Record last modified

ubikasec waap cloud UPGRADE

Affected: < 6.11.0 · < 6.5.6 · 6.5.6

Fixed in: 6.5.6, 6.11.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy waap-cloud || rpm -q waap-cloud || waap-cloud --version

2. UPGRADE to 6.5.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade waap-cloud

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade waap-cloud

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

ubikasec waap gateway UPGRADE

Affected: < 6.11.0 · < 6.5.6 · 6.5.6

Fixed in: 6.5.6, 6.11.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy waap-gateway || rpm -q waap-gateway || waap-gateway --version

2. UPGRADE to 6.5.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade waap-gateway

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade waap-gateway

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-26261?

waap cloud: upgrade to 6.5.6, 6.11.0; waap gateway: upgrade to 6.5.6, 6.11.0. Exact commands for each OS are on this page.

Is CVE-2023-26261 being exploited?

CVE-2023-26261 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-26261 affect?

CVE-2023-26261 affects waap cloud, waap gateway. Severity is critical (CVSS 9.8). In UBIKA WAAP Gateway/Cloud through 6.10, a blind XPath injection leads to an authentication bypass by stealing the session of another connected user. The fixed versions are WAAP Gateway & Cloud 6.11.0 and 6.5.6-patch15.

How urgent is CVE-2023-26261?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

References

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