02 Records
FEED: ACQUIRING
01 RecordSTATE: PUBLISHED
02 Description
CNA: facebookThe fb_unserialize function did not impose a depth limit for nested deserialization. That meant a maliciously constructed string could cause deserialization to recurse, leading to stack exhaustion.
03 Exploitation and scoring
SRC: CISA, FIRST, NVD, RED HAT- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.21% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Ranks above 66.3% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
SCHEMA: 5.1
- Published
- 2021-03-11 00:55Z5 YR AGO
- Last updated
- 2024-08-04 06:53Z2 YR AGO
- Reserved
- 2019-12-02
- Assigning CNA
- facebook
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- ec3ad066a903ccc694e145a301ad0f92c309f1158c5f048e46187fbf4b13ace1
05 Affected products
PAIRS: 1VendorProductVersionsPlatforms
FacebookHHVM4.62.0, 4.61.0, 4.60.0, 4.59.0, 4.58.0 to < unspecified, 4.57.0, 4.33.0 to < unspecified, < 4.32.3—