Security readout for executives and security teams
Plain-English summary
Mautic had a stored cross-site scripting flaw in contact tracking and page hits reporting. Malicious content could be saved and later rendered in the application. The business risk is unauthorized actions or data exposure within the context of a user viewing affected reports.
Executive priority
Treat this as a high-priority application security update for internet-facing or business-critical Mautic systems. Prioritize confirmation of affected versions and vendor patching over speculative exploit concerns.
Technical view
CVE-2021-27917 is a CWE-79 stored XSS issue in Mautic before the referenced patch. The CVSS 3.1 score is 7.3 with network attack vector, low complexity, no privileges, and no user interaction recorded in the provided metadata.
Likely exposure
Organizations running Mautic versions covered by the advisory may be exposed, especially where contact tracking or page hits reporting is used. The provided version data is broad and should be verified against Mautic's advisory.
Exploitation context
The source bundle does not identify active exploitation, and the CVE is not marked as KEV. No public exploit status is established by the provided sources.
Researcher notes
Evidence is sparse in the provided bundle. The affected version expression appears broad, so validate against the GitHub advisory before scoping. Do not assume exploitation, fixed versions, or alternate products beyond the cited Mautic sources.
Mitigation direction
- Review the Mautic security advisory for exact fixed versions.
- Upgrade affected Mautic deployments using vendor-supported releases.
- Limit report access to trusted users until patch status is confirmed.
- Review stored report data for suspicious script-like content.
Validation and detection
- Inventory all Mautic deployments and recorded versions.
- Confirm whether contact tracking and page hits reports are enabled or used.
- Compare installed versions against the Mautic advisory.
- Verify patched systems no longer match affected version guidance.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: 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-2021-27917 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A: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.
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L3.93.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/mautic/mautic/security/advisories/GHSA-xpc5-rr39-v8v2CVE reference
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 Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.