Security readout for executives and security teams
Plain-English summary
Advanced Guestbook 2.4.4 can store malicious script in its smilies administration area. Because the script later runs when administrators view that tab, a low-privileged authenticated attacker could affect admin sessions or trusted admin views.
Executive priority
Treat this as a targeted cleanup item, not a broad emergency. Prioritize if the guestbook is internet-facing, legacy, or administered by multiple users.
Technical view
The issue is CWE-79 persistent XSS in the smilies administration interface. The source bundle identifies the s_emotion parameter as the stored input and admin.php as the affected endpoint. CVSS 3.1 is 6.4, with low attack complexity, low privileges required, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure appears limited to Ampps Advanced Guestbook version 2.4.4, especially installations where authenticated users beyond trusted administrators can reach smilies administration functions.
Exploitation context
The CVE is not listed as KEV in the provided bundle. ExploitDB is cited as a public exploit reference, but the sources do not show active exploitation in the wild.
Researcher notes
Evidence supports authenticated persistent XSS in Advanced Guestbook 2.4.4. The bundle does not identify a fixed release, vendor patch, or active exploitation, so remediation should be anchored to vendor guidance and exposure reduction.
Mitigation direction
- Confirm whether Advanced Guestbook 2.4.4 is deployed anywhere.
- Check vendor and advisory sources for fixed versions or official guidance.
- Restrict guestbook administration access to trusted administrators only.
- Review existing smilies entries and remove unexpected script or markup.
- Retire or isolate the application if it is no longer required.
Validation and detection
- Inventory internet-facing and internal Advanced Guestbook deployments.
- Verify the installed version is not Advanced Guestbook 2.4.4.
- Review admin users with access to smilies management.
- Inspect smilies records for unexpected HTML or script content.
- Check logs for suspicious authenticated admin.php smilies changes.
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-2021-47950 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
- Medium
- CVSS
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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
2 official scoresWe 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:L/UI:N/S:C/C:L/I:L/A:N3.12.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
5.1MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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
- ExploitDB-49875CVE reference, VulnCheck · exploit
- Official Product HomepageCVE reference, VulnCheck · product
- VulnCheck Advisory: Advanced Guestbook 2.4.4 Persistent XSS via SmiliesCVE reference, VulnCheck · third-party-advisory
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.