CVE-2025-50481 json
Mezzanine CMS vulnerable to Cross-site Scripting
published 2025-07-23 15 mo ago modified 2026-06-17 4 mo ago also GHSA-269j-37ww-cmh3 , PYSEC-2025-137 , EUVD-2025-22459
- cvss
- 4.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 52%
- public exploits
- 1
- Exploit-DB
Summary
A cross-site scripting (XSS) vulnerability in the component /blog/blogpost/add of Mezzanine CMS v6.1.0 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into a blog post.
Timeline
- Published
- First public exploit (EDB-52385)
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 15 mo ago
Exploit prediction
0.69% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-52385 Mezzanine CMS 6.1.0 - Stored Cross Site Scripting (XSS) webapps, 2025-07-28
- github.com https://github.com/kevinpdicks/Mezzanine-CMS-6.1.0-XSS referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | mezzanine | <=6.1.0 |
no fix listed |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/kevinpdicks/Mezzanine-CMS-6.1.0-XSS
exploit, web, third-party-advisory, evidence
-
github.com
/stephenmcd/mezzanine
package, product
-
nvd.nist.gov
/vuln/detail/CVE-2025-50481
advisory
-
github.com
/pypa/advisory-database/tree/main/vulns/mezzanine/PYSEC-2025-137.yaml
web
-
github.com
/advisories/GHSA-269j-37ww-cmh3
advisory
Sources
- CVE List CVE-2025-50481
- GitHub Advisory GHSA-269j-37ww-cmh3
- NVD CVE-2025-50481
- OSV PYSEC-2025-137
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.