Security readout for executives and security teams
Plain-English summary
This is a low-severity XSS issue in the GDPR cookies module for Backdrop CMS before 1.x-1.3.5. It requires a privileged user to place malicious content in the optional YouTube service Info content field, and the site must use that YouTube service configuration.
Executive priority
Treat as routine patching unless privileged content editors are untrusted or loosely governed. The business risk is limited by required permissions and configuration, but affected public sites should still update promptly.
Technical view
CVE-2025-71310 is a CWE-80 cross-site scripting flaw in Backdrop CMS GDPR cookies module versions before 1.x-1.3.5. The vulnerable path is limited to the YouTube service Info content field. The CVSS 4.0 score is 1.8 with high privileges, high complexity, prerequisite configuration, and user interaction required.
Likely exposure
Exposure is narrow: Backdrop CMS sites using the GDPR cookies module below 1.x-1.3.5, with a configured YouTube service, and roles allowed to create or edit GDPR Cookies Services.
Exploitation context
The provided sources do not cite active exploitation, and this CVE is not marked KEV. Practical abuse depends on privileged configuration access and a visitor or user interacting with the affected rendered content.
Researcher notes
The public record describes the condition and permission prerequisites but does not provide detailed patch internals in the supplied bundle. Validate against vendor advisory and local module behavior without assuming broader Backdrop CMS impact.
Mitigation direction
- Update the GDPR cookies module to 1.x-1.3.5 or later, following vendor guidance.
- Restrict "Create a GDPR Cookies Service" and "Edit any GDPR Cookies Service" permissions.
- Review existing YouTube service Info content for unexpected or unsafe content.
- Monitor Backdrop CMS advisory updates for any additional remediation guidance.
Validation and detection
- Inventory Backdrop sites using the GDPR cookies module and record installed versions.
- Confirm whether any site has a YouTube GDPR Cookies Service configured.
- Review roles granted GDPR Cookies Service create or edit permissions.
- Verify the Info content field renders safely after updating.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-80: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-71310 mapping review
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Open ATT&CK lookup- Severity
- Low
- CVSS
- 1.8 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L——mitreVulnerability scoring details
Base CVSS 4.0 score
1.8LowVector: CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://backdropcms.org/security/sa-contrib-2025-013CVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.