How severe is CVE-2026-25511?

CVE-2026-25511 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-25511 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25511?

CVE-2026-25511 affects Group-office Group Office. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25511?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-25511 have an EU (EUVD) identifier?

Yes. CVE-2026-25511 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5348.

When was CVE-2026-25511 published?

CVE-2026-25511 was published on 2026-02-04 and last updated on 2026-06-17.

CVE-2026-25511

CVE-2026-25511 is a medium-severity vulnerability in Group-office Group Office with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v4: 8.2
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5348
Weakness: CWE-918
Affected product: Group-office Group Office
Published: 2026-02-04
Last modified: 2026-06-17

Description

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.150, 25.0.82, and 26.0.5, an authenticated user within the System Administrator group can trigger a full SSRF via the WOPI service discovery URL, including access to internal hosts/ports. The SSRF response body can be exfiltrated via the built‑in debug system, turning it into a visible SSRF. This also allows full server-side file read. This issue has been patched in versions 6.8.150, 25.0.82, and 26.0.5.

Frequently asked questions

What is CVE-2026-25511?: Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.150, 25.0.82, and 26.0.5, an authenticated user within the System Administrator group can trigger a full SSRF via the WOPI service discovery URL, including access to internal hosts/ports. The SSRF response body can be exfiltrated via the built‑in debug system, turning it into a visible SSRF. This also allows full server-side file read. This issue has been patched in versions 6.8.150, 25.0.82, and 26.0.5.
How severe is CVE-2026-25511?: CVE-2026-25511 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-25511 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25511?: CVE-2026-25511 affects Group-office Group Office. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25511?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-25511 have an EU (EUVD) identifier?: Yes. CVE-2026-25511 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5348.
When was CVE-2026-25511 published?: CVE-2026-25511 was published on 2026-02-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:group-office:group_office:*:*:*:*:*:*:*:*

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