CVE-2025-53505VulnerabilityPublished 21 Aug 2025

CVE-2025-53505: Intermesh BV Group-Office · Path Traversal

Affects Intermesh BV Group-OfficeSource CVE Database V5

Not known to be exploited · CVSS 4.3 Medium : upgrade to 6.8.119 when convenient.

Data as of 26 Oct 2026, 08:11 UTC

CVSS 3.0 base score

4.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 6.8.119

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 21 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Intermesh BV Group-Office to 6.8.119.

Affected software

Product	Affected	Fixed in
Intermesh BV Group-Office	Affected <6.8.119	Fixed in 6.8.119

AI-suggested

European organizations should immediately verify their Group-Office versions and upgrade to version 6.8.119 or later (or 25.0.20 or later) where the vulnerability is patched. In addition to patching, organizations should implement strict access controls to limit authenticated user privileges, minimizing the risk of low-privilege users exploiting this vulnerability. Regularly audit file permissions and server directory structures to ensure sensitive files are not unnecessarily exposed. Employ web application firewalls (WAFs) with rules to detect and block path traversal attempts. Monitoring and logging access to critical files and directories can help detect exploitation attempts early. Finally, conduct user training to reduce the risk of credential compromise that could enable attackers to gain the required low-level privileges.

Description

Group-Office versions prior to 6.8.119 and prior to 25.0.20 provided by Intermesh BV contain a path traversal vulnerability. If this vulnerability is exploited, information on the server hosting the product may be exposed.

Impact

For European organizations using Group-Office, this vulnerability poses a risk of sensitive internal information leakage, including potentially confidential documents, configuration files, or user data stored on the server. Since Group-Office is commonly used in business and governmental environments for collaboration and communication, unauthorized access to server files could lead to exposure of intellectual property, personal data protected under GDPR, or internal operational details. This could result in reputational damage, regulatory penalties, and loss of competitive advantage. The medium severity suggests that while the risk is not immediately critical, organizations should prioritize patching to prevent attackers with low-level access from escalating their information gathering capabilities. The lack of known active exploitation reduces immediate urgency but does not eliminate the threat, especially as attackers could develop exploits following public disclosure.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 21 Aug 2025, 04:47 UTC

Technical details

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