Vulnerability-Lookup

GHSA-9CV3-XR79-R4JW

Vulnerability from github – Published: 2026-05-16 18:31 – Updated: 2026-05-16 18:31

Details

MyBB Timeline Plugin 1.0 contains cross-site scripting vulnerabilities that allow attackers to inject malicious scripts through thread titles, post content, and user profile fields like Location and Bio. Attackers can also exploit a cross-site request forgery vulnerability in the timeline.php profile action to change a user's cover picture by crafting malicious forms that execute when victims visit affected profiles.

Severity

5.3 (Medium)


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

6.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47934"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-16T16:16:21Z",
    "severity": "MODERATE"
  },
  "details": "MyBB Timeline Plugin 1.0 contains cross-site scripting vulnerabilities that allow attackers to inject malicious scripts through thread titles, post content, and user profile fields like Location and Bio. Attackers can also exploit a cross-site request forgery vulnerability in the timeline.php profile action to change a user\u0027s cover picture by crafting malicious forms that execute when victims visit affected profiles.",
  "id": "GHSA-9cv3-xr79-r4jw",
  "modified": "2026-05-16T18:31:38Z",
  "published": "2026-05-16T18:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47934"
    },
    {
      "type": "WEB",
      "url": "https://community.mybb.com/mods.php?action=view\u0026pid=1428"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/49467"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/mybb-timeline-plugin-cross-site-scripting-and-csrf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2021-47934 (GCVE-0-2021-47934)

Vulnerability from cvelistv5 – Published: 2026-05-16 15:26 – Updated: 2026-05-18 13:43

Title

MyBB Timeline Plugin 1.0 Cross-Site Scripting and CSRF

Summary

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

5.3 (Medium)


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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

VulnCheck

References

3 references

URL	Tags
https://www.exploit-db.com/exploits/49467	exploit
https://community.mybb.com/mods.php?action=view&p…	product
https://www.vulncheck.com/advisories/mybb-timelin…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
MyBB	MyBB Timeline Plugin	Affected: 1.0

Date Public

2021-01-21 00:00

Credits

0xB9

Show details on NVD website

JSON

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  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47934",
                "options": [
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                  },
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                  },
                  {
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-18T13:43:17.367210Z",
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            }
          ]
        }
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      "credits": [
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        }
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            "Recovery": "NOT_DEFINED",
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        },
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        },
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-9CV3-XR79-R4JW

CVE-2021-47934 (GCVE-0-2021-47934)

Tags

Sightings

Nomenclature