CVE-2025-48916VulnerabilityPublished 13 Jun 2025

CVE-2025-48916: Drupal Bookable Calendar · Missing Authorization

Affects Drupal Bookable CalendarSource CVE Database V5

Not known to be exploited · CVSS 6.5 Medium : upgrade to 2.2.13 when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

6.5Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 2.2.13

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
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: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
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: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on 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 13 Jun 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 2026-10-25.

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 drupal/bookable_calendar to 2.2.13.

Affected software

Product	Affected	Fixed in
Packagistdrupal/bookable_calendar`pkg:composer/drupal/bookable_calendar`Other threats	Affected =0.0.0 <2.2.13	Fixed in 2.2.13

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

AI-suggested

Organizations should immediately verify the version of the Bookable Calendar module in use and upgrade to version 2.2.13 or later, where the authorization checks have been corrected. If upgrading is not immediately feasible, implement compensating controls such as restricting access to the calendar module via web application firewalls (WAFs) or network segmentation to limit exposure. Conduct thorough access reviews to ensure that only authorized users have permissions related to calendar booking functionalities. Additionally, implement monitoring and logging of access to calendar-related endpoints to detect unusual or unauthorized browsing attempts. Security teams should perform penetration testing focused on authorization bypass scenarios within Drupal modules. Finally, maintain regular updates of Drupal core and contributed modules to reduce exposure to similar vulnerabilities and subscribe to Drupal security advisories for timely alerts.

Description

Missing Authorization vulnerability in Drupal Bookable Calendar allows Forceful Browsing.This issue affects Bookable Calendar: from 0.0.0 before 2.2.13.

Impact

For European organizations using Drupal with the Bookable Calendar module, this vulnerability could lead to unauthorized disclosure of sensitive booking information, potentially including customer data, internal scheduling, or resource allocation details. This exposure could compromise confidentiality and possibly integrity if unauthorized users can manipulate bookings or calendar entries. The impact is particularly critical for sectors relying heavily on booking systems, such as healthcare, hospitality, education, and public services. Unauthorized access could lead to privacy violations under GDPR, reputational damage, and operational disruptions if attackers manipulate calendar data. Since Drupal is widely adopted across Europe for governmental, educational, and commercial websites, the risk extends to a broad range of organizations. The lack of authentication or authorization checks could also facilitate lateral movement within compromised environments, increasing the overall risk profile. While availability impact is less direct, unauthorized modifications could disrupt normal operations. The absence of known exploits suggests a window for proactive mitigation before widespread exploitation occurs.

CWE-862Missing Authorization (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #4OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Architecture and Design
Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries.
Architecture and Design
Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
Attack patterns
Exploitation of Thunderbolt Protection Flaws (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

drupal.org/sa-contrib-2025-070 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 13 Jun 2025, 16:05 UTC

WeaknessesCWE-862

Technical details

References

Community reviews

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